Support for XP-Pen Artist Pro 12

[Alex-PK]

First of all: thank you all for your work!

I just got an XP-Pen Artist Pro 12, and it's working with the standard drivers, but the buttons are not configurable.

$ lsusb 
Bus 001 Device 012: ID 28bd:1227 UGTABLET TABLET

$ xinput
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Logitech K270                           	id=9	[slave  pointer  (2)]
⎜   ↳ Logitech M185                           	id=10	[slave  pointer  (2)]
⎜   ↳ Logitech M525                           	id=11	[slave  pointer  (2)]
⎜   ↳ HOLTEK USB-HID Keyboard Mouse           	id=17	[slave  pointer  (2)]
⎜   ↳ HOLTEK USB-HID Keyboard Consumer Control	id=19	[slave  pointer  (2)]
⎜   ↳ UGTABLET TABLET Mouse                   	id=14	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Power Button                            	id=7	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
    ↳ Dell Dell AC511 USB SoundBar            	id=12	[slave  keyboard (3)]
    ↳ HOLTEK USB-HID Keyboard                 	id=16	[slave  keyboard (3)]
    ↳ HOLTEK USB-HID Keyboard System Control  	id=18	[slave  keyboard (3)]
    ↳ HOLTEK USB-HID Keyboard                 	id=20	[slave  keyboard (3)]
    ↳ Logitech K270                           	id=21	[slave  keyboard (3)]
    ↳ HOLTEK USB-HID Keyboard Consumer Control	id=22	[slave  keyboard (3)]
    ↳ UGTABLET TABLET Keyboard                	id=13	[slave  keyboard (3)]
    ↳ UGTABLET TABLET                         	id=15	[slave  keyboard (3)]

$ ./uclogic-probe 1 2
M 55 00 47 00 54 00 41 00 42 00 4C 00 45 00 54 00
P 31 00 31 00 2E 00 36 00 20 00 69 00 6E 00 63 00 68 00 20 00 50 00 65 00 6E 00 44 00 69 00 73 00 70 00 6C 00 61 00 79 00
S 64 0E 03 22 64 4F 38 08 01 FF 1F EC 09 00 00
S 65 04 03 00 67
S 6E 0B 03 00 30 00 03 08 01 00 00 00
S 79 10 03 20 20 20 20 20 20 20 20 20 20 20 20 20 20
S 7A 08 03 00 00 00 00 00 00
S 7B 0C 03 48 00 4B 00 20 00 4F 00 6E 00
Failed to get string descriptor 0xC8: Input/Output Error

Please let me know if I can help in any way (collecting more data, testing patches, ...)

[alfazaz]

Same state as @Alex-PK ... How to make this graphical tablet all working ?

[alfazaz]

Tablet diagnostic :

lsusb :
Bus 001 Device 006: ID 28bd:091f UGTABLET 11.6 inch PenDisplay

T=28bd:091f

USB descriptors :
descriptors.txt

hid_report_descriptors.txt

uclogic-probe : (which ends with a "Failed to get string descriptor 0xC8: Input/Output Error" ???)
probe.txt

I tried to adapt things with #291 but without any success...

I lack guidelines to make all this tablet all work... :-(

[Korvox]

If you think this tablet behaves identically to the 15.6 Pro you can just add the USB ids to hid-ids 28bd:1227 and a case fallthrough for it in uclogic_params_init in hid-uclogic-params.c. Then the driver would treat it as an identical device. The patches I wrote query for the physical device info rather than have it hardcoded because I assumed other UGEE tablets would behave similarly.

[alfazaz]

Thanks for your answer.

I will give it a try as soon as possible with details (to see at what step things go wrong if Murphys Laws are true ;-) ).

Must I start with https://github.com/Korvox/digimend-kernel-drivers or https://github.com/underdoeg/digimend-kernel-drivers or another ?

[alfazaz]

Hello @Korvox

Here are my steps. If you have time to look if things are normal or stranges... Thanks !

1. Install clean kernel + kernel-headers (last archlinux version = 5.6.13-arch1-1)

2. Downloaded and extracted digimend-kernel-drivers-master.zip from https://github.com/underdoeg/digimend-kernel-drivers

3. Edited hid-ids.h :

After

#define USB_DEVICE_ID_UGEE_XPPEN_TABLET_A156P	0x090d

Added

#define USB_DEVICE_ID_UGEE_XPPEN_TABLET_A12P	0x091f

(it's not 0x1227 because lsusb shows
Bus 001 Device 007: ID 28bd:091f UGTABLET 11.6 inch PenDisplay
and I think the 1227 comes after a failed uclogic-probe execution...)

4. Edited hid-uclogic-params.c :

Changed

	case VID_PID(USB_VENDOR_ID_UGEE,
			USB_DEVICE_ID_UGEE_XPPEN_TABLET_A156P):

Into

	/* FALL THROUGH */
	case VID_PID(USB_VENDOR_ID_UGEE,
			USB_DEVICE_ID_UGEE_XPPEN_TABLET_A12P):
	case VID_PID(USB_VENDOR_ID_UGEE,
			USB_DEVICE_ID_UGEE_XPPEN_TABLET_A156P):

5. Edited hid-uclogic-core.c (you didn't say this but it's useful no ?) :

After

	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
				USB_DEVICE_ID_UGEE_XPPEN_TABLET_A156P) },

Added

	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
				USB_DEVICE_ID_UGEE_XPPEN_TABLET_A12P) },

6. DKMS install with sudo make dkms_install which gives these messages :

dkms add .

Creating symlink /var/lib/dkms/digimend/10/source ->
                 /usr/src/digimend-10

DKMS: add completed.
dkms build digimend/10

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area...
make -j8 KERNELRELEASE=5.6.13-arch1-1 KVERSION=5.6.13-arch1-1...
cleaning build area...
Kernel cleanup unnecessary for this kernel.  Skipping...

DKMS: build completed.
dkms install digimend/10

hid-kye.ko.xz:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/5.6.13-arch1-1/extra/

hid-uclogic.ko.xz:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/5.6.13-arch1-1/extra/

hid-polostar.ko.xz:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/5.6.13-arch1-1/extra/

hid-viewsonic.ko.xz:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/5.6.13-arch1-1/extra/

depmod.....

DKMS: install completed.
install -D -m 0755 hid-rebind /lib/udev/hid-rebind
install -D -m 0644 udev.rules /lib/udev/rules.d/90-digimend.rules
install -D -m 0644 xorg.conf /usr/share/X11/xorg.conf.d/50-digimend.conf
udevadm control --reload

7. Something strange (?) : in these latest messages, I read that no original module exists within this kernel... but they are present (before and after) in /usr/lib/modules/5.6.13-arch1-1/kernel/drivers/hid/

For example :
ls -l /usr/lib/modules/5.6.13-arch1-1/kernel/drivers/hid/hid-uclogic.ko.xz
gives

-rw-r--r-- 1 root root 10180 14 mai   08:52 /usr/lib/modules/5.6.13-arch1-1/kernel/drivers/hid/hid-uclogic.ko.xz

And modinfo hid-uclogic gives

filename:       /lib/modules/5.6.13-arch1-1/kernel/drivers/hid/hid-uclogic.ko.xz
license:        GPL
author:         Nikolai Kondrashov
author:         Martin Rusko
srcversion:     A9FEE4A39FA2FF4C06DA449
alias:          hid:b0003g*v000028BDp00000042
alias:          hid:b0003g*v000028BDp00000094
alias:          hid:b0003g*v000028BDp00000075
alias:          hid:b0003g*v000028BDp00000055
alias:          hid:b0003g*v000028BDp00000071
alias:          hid:b0003g*v000028BDp00000074
alias:          hid:b0003g*v00002179p00000053
alias:          hid:b0003g*v00005543p00003031
alias:          hid:b0003g*v00005543p00000047
alias:          hid:b0003g*v00005543p00000045
alias:          hid:b0003g*v00005543p00000081
alias:          hid:b0003g*v00005543p0000004D
alias:          hid:b0003g*v00005543p0000006E
alias:          hid:b0003g*v0000256Cp0000006D
alias:          hid:b0003g*v0000256Cp0000006E
alias:          hid:b0003g*v00005543p00000781
alias:          hid:b0003g*v00005543p00000522
alias:          hid:b0003g*v00005543p00000064
alias:          hid:b0003g*v00005543p00000005
alias:          hid:b0003g*v00005543p00000004
alias:          hid:b0003g*v00005543p00000003
alias:          hid:b0003g*v00005543p00000042
depends:        hid,usbhid
retpoline:      Y
intree:         Y
name:           hid_uclogic
vermagic:       5.6.13-arch1-1 SMP preempt mod_unload 
sig_id:         PKCS#7
signer:         Build time autogenerated kernel key
sig_key:        31:24:70:FB:85:38:5F:97:BA:1A:DE:2C:1E:74:2C:D1:C5:CE:95:40
sig_hashalgo:   sha512
signature:      63:F8:F0:7C:87:... (shortened by me...)

8. Just a little check of the fresh adpated module in /usr/lib/modules/5.6.13-arch1-1/extra with
   modinfo /usr/lib/modules/5.6.13-arch1-1/extra/hid-uclogic.ko.xz

filename:       /usr/lib/modules/5.6.13-arch1-1/extra/hid-uclogic.ko.xz
version:        10
license:        GPL
author:         Nikolai Kondrashov
author:         Martin Rusko
srcversion:     0DEE6ED60839C655406E636
alias:          hid:b0003g*v000028BDp0000091F
alias:          hid:b0003g*v000028BDp0000090D
alias:          hid:b0003g*v000028BDp00000042
alias:          hid:b0003g*v000028BDp00000094
alias:          hid:b0003g*v000028BDp00000075
alias:          hid:b0003g*v000028BDp00000055
alias:          hid:b0003g*v000028BDp00000071
alias:          hid:b0003g*v000028BDp00000074
alias:          hid:b0003g*v00002179p00000053
alias:          hid:b0003g*v00005543p00003031
alias:          hid:b0003g*v00005543p00000047
alias:          hid:b0003g*v00005543p00000045
alias:          hid:b0003g*v00005543p00000081
alias:          hid:b0003g*v00005543p0000004D
alias:          hid:b0003g*v00005543p0000006E
alias:          hid:b0003g*v0000256Cp0000006D
alias:          hid:b0003g*v0000256Cp0000006E
alias:          hid:b0003g*v00005543p00000781
alias:          hid:b0003g*v00005543p00000522
alias:          hid:b0003g*v00005543p00000064
alias:          hid:b0003g*v00005543p00000005
alias:          hid:b0003g*v00005543p00000004
alias:          hid:b0003g*v00005543p00000003
alias:          hid:b0003g*v00005543p00000042
depends:        hid,usbhid
retpoline:      Y
name:           hid_uclogic
vermagic:       5.6.13-arch1-1 SMP preempt mod_unload 

The alias to my tablet is present.

9. Make sure the previous versions of the drivers are unloaded (tablet disconnected) :

sudo modprobe -r hid-kye hid-uclogic hid-polostar hid-viewsonic

10. And I rebooted also...

11. Check before connection of my tablet with lsmod | grep hid gives

hid_logitech_hidpp     45056  0
hid_logitech_dj        28672  0
hid_multitouch         32768  0
hid_generic            16384  0
usbhid                 65536  1 hid_logitech_dj
i2c_hid                32768  0
hid                   143360  6 i2c_hid,usbhid,hid_multitouch,hid_generic,hid_logitech_dj,hid_logitech_hidpp
mac_hid                16384  0
intel_hid              24576  0
sparse_keymap          16384  2 intel_hid,dell_wmi

12. Then, I connect USB cable of my XP PEN artist 12 Pro tablet. A new check with lsmod | grep hid gives

hid_logitech_hidpp     45056  0
hid_logitech_dj        28672  0
hid_multitouch         32768  0
hid_generic            16384  0
usbhid                 65536  1 hid_logitech_dj
i2c_hid                32768  0
hid                   143360  6 i2c_hid,usbhid,hid_multitouch,hid_generic,hid_logitech_dj,hid_logitech_hidpp
mac_hid                16384  0
intel_hid              24576  0
sparse_keymap          16384  2 intel_hid,dell_wmi

so no difference... No hid_uclogic loaded. I think that the old hid-uclogic takes over my new one. When I type modinfo hid-uclogic, it keeps on giving this :

filename:       /lib/modules/5.6.13-arch1-1/kernel/drivers/hid/hid-uclogic.ko.xz
license:        GPL
author:         Nikolai Kondrashov
author:         Martin Rusko
srcversion:     A9FEE4A39FA2FF4C06DA449
alias:          hid:b0003g*v000028BDp00000042
alias:          hid:b0003g*v000028BDp00000094
alias:          hid:b0003g*v000028BDp00000075
alias:          hid:b0003g*v000028BDp00000055
alias:          hid:b0003g*v000028BDp00000071
alias:          hid:b0003g*v000028BDp00000074
alias:          hid:b0003g*v00002179p00000053
alias:          hid:b0003g*v00005543p00003031
alias:          hid:b0003g*v00005543p00000047
alias:          hid:b0003g*v00005543p00000045
alias:          hid:b0003g*v00005543p00000081
alias:          hid:b0003g*v00005543p0000004D
alias:          hid:b0003g*v00005543p0000006E
alias:          hid:b0003g*v0000256Cp0000006D
alias:          hid:b0003g*v0000256Cp0000006E
alias:          hid:b0003g*v00005543p00000781
alias:          hid:b0003g*v00005543p00000522
alias:          hid:b0003g*v00005543p00000064
alias:          hid:b0003g*v00005543p00000005
alias:          hid:b0003g*v00005543p00000004
alias:          hid:b0003g*v00005543p00000003
alias:          hid:b0003g*v00005543p00000042
depends:        hid,usbhid
retpoline:      Y
intree:         Y
name:           hid_uclogic
vermagic:       5.6.13-arch1-1 SMP preempt mod_unload 
sig_id:         PKCS#7
signer:         Build time autogenerated kernel key
sig_key:        31:24:70:FB:85:38:5F:97:BA:1A:DE:2C:1E:74:2C:D1:C5:CE:95:40
sig_hashalgo:   sha512
signature:      63:F8:F0:7C:... (shortened by me)

And xinput gives this :

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Mouse                id=13   [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Touchpad             id=14   [slave  pointer  (2)]
⎜   ↳ Logitech M325                             id=11   [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                   id=19   [slave  pointer  (2)]
⎜   ↳ UGTABLET 11.6 inch PenDisplay Mouse       id=21   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Power Button                              id=9    [slave  keyboard (3)]
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]
    ↳ Intel HID events                          id=15   [slave  keyboard (3)]
    ↳ Intel HID 5 button array                  id=16   [slave  keyboard (3)]
    ↳ Dell WMI hotkeys                          id=17   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=18   [slave  keyboard (3)]
    ↳ Integrated_Webcam_HD: Integrate           id=12   [slave  keyboard (3)]
    ↳ UGTABLET 11.6 inch PenDisplay Keyboard    id=20   [slave  keyboard (3)]
    ↳ UGTABLET 11.6 inch PenDisplay             id=22   [slave  keyboard (3)]

If I approach the stylus of the tablet, it works and xinput changes into :

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Mouse                id=13   [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Touchpad             id=14   [slave  pointer  (2)]
⎜   ↳ Logitech M325                             id=11   [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                   id=19   [slave  pointer  (2)]
⎜   ↳ UGTABLET 11.6 inch PenDisplay Mouse       id=21   [slave  pointer  (2)]
⎜   ↳ UGTABLET 11.6 inch PenDisplay Pen (0)     id=23   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Power Button                              id=9    [slave  keyboard (3)]
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]
    ↳ Intel HID events                          id=15   [slave  keyboard (3)]
    ↳ Intel HID 5 button array                  id=16   [slave  keyboard (3)]
    ↳ Dell WMI hotkeys                          id=17   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=18   [slave  keyboard (3)]
    ↳ Integrated_Webcam_HD: Integrate           id=12   [slave  keyboard (3)]
    ↳ UGTABLET 11.6 inch PenDisplay Keyboard    id=20   [slave  keyboard (3)]
    ↳ UGTABLET 11.6 inch PenDisplay             id=22   [slave  keyboard (3)]

@Korvox : do you think that all is normal until there ? Steps 6-7. seem to be really strange... I will try to load wacom driver in Xorg after if nothing it's wrong... but I think there is a problem with steps 6-7.

[Korvox]

Doing dkms install on Arch with the upstream sources names the modules differently (drivers/hid vs drivers/extra). Use the AUR package digimend-kernel-drivers-dkms-git and change its source to your local fork. It sounds like the make variant might not be installing depmod properly.

[alfazaz]

Thanks !

There is the same problem with the AUR package and I think it comes form the content of dkms.conf.

I think that the following lines in dkms.conf are bad :

DEST_MODULE_LOCATION[0]="/extra"
DEST_MODULE_LOCATION[1]="/extra"
DEST_MODULE_LOCATION[2]="/extra"
DEST_MODULE_LOCATION[3]="/extra"

I will make more tests when I will have time again... I cross my fingers...

[nic3-14159]

I had a similar problem, and it seems that make dkms_install is not installing depmod.conf, which tells Linux to override the kernel modules in kernel/drivers/hid with the modules in extra/. I am also on Arch. I fixed this by editing the Makefile to install/uninstall depmod.conf.

From:
dkms_install: dkms_modules_install udev_rules_install xorg_conf_install
to
dkms_install: depmod_conf_install dkms_modules_install udev_rules_install xorg_conf_install
and
dkms_uninstall: dkms_modules_uninstall udev_rules_uninstall xorg_conf_uninstall
to
dkms_uninstall: depmod_conf_uninstall dkms_modules_uninstall udev_rules_uninstall xorg_conf_uninstall

[alfazaz]

@nic3-14159 Ok. I tried changing dkms.conf and the modinfo is ok now but your way is cleaner may be. I will go on your way to see...

[alfazaz]

Hello @Korvox

Here are my new steps...

1. to 5. Like before.

Added a new thing before the 6. step (no need to do the two ways at the same time and I don't know exactly which is the greatest way but each ways is ok) :

• OLD way :
  Edited dkms.conf so that dkms install works in a right way...

Changed

DEST_MODULE_LOCATION[0]="/extra"
DEST_MODULE_LOCATION[1]="/extra"
DEST_MODULE_LOCATION[2]="/extra"
DEST_MODULE_LOCATION[3]="/extra"

To

DEST_MODULE_LOCATION[0]="/kernel/drivers/hid"
DEST_MODULE_LOCATION[1]="/kernel/drivers/hid"
DEST_MODULE_LOCATION[2]="/kernel/drivers/hid"
DEST_MODULE_LOCATION[3]="/kernel/drivers/hid"

• NEW way :
  Edited Makefile so that modules in extra/ override the same already in kernel/drivers/hid.

Changed

dkms_install: dkms_modules_install udev_rules_install xorg_conf_install
	udevadm control --reload

dkms_uninstall: dkms_modules_uninstall udev_rules_uninstall xorg_conf_uninstall
	udevadm control --reload

To

dkms_install: depmod_conf_install dkms_modules_install udev_rules_install xorg_conf_install
	udevadm control --reload

dkms_uninstall: depmod_conf_uninstall dkms_modules_uninstall udev_rules_uninstall xorg_conf_uninstall
	udevadm control --reload

6. DKMS install with sudo make dkms_install (messages are normal)

7. and 8. Strange things of my last try disappeared... Great !

modinfo hid-uclogic gives a good answer :

filename:       /lib/modules/5.6.13-arch1-1/kernel/drivers/hid/hid-uclogic.ko.xz
version:        10
license:        GPL
author:         Nikolai Kondrashov
author:         Martin Rusko
srcversion:     0DEE6ED60839C655406E636
alias:          hid:b0003g*v000028BDp0000091F
alias:          hid:b0003g*v000028BDp0000090D
alias:          hid:b0003g*v000028BDp00000042
alias:          hid:b0003g*v000028BDp00000094
alias:          hid:b0003g*v000028BDp00000075
alias:          hid:b0003g*v000028BDp00000055
alias:          hid:b0003g*v000028BDp00000071
alias:          hid:b0003g*v000028BDp00000074
alias:          hid:b0003g*v00002179p00000053
alias:          hid:b0003g*v00005543p00003031
alias:          hid:b0003g*v00005543p00000047
alias:          hid:b0003g*v00005543p00000045
alias:          hid:b0003g*v00005543p00000081
alias:          hid:b0003g*v00005543p0000004D
alias:          hid:b0003g*v00005543p0000006E
alias:          hid:b0003g*v0000256Cp0000006D
alias:          hid:b0003g*v0000256Cp0000006E
alias:          hid:b0003g*v00005543p00000781
alias:          hid:b0003g*v00005543p00000522
alias:          hid:b0003g*v00005543p00000064
alias:          hid:b0003g*v00005543p00000005
alias:          hid:b0003g*v00005543p00000004
alias:          hid:b0003g*v00005543p00000003
alias:          hid:b0003g*v00005543p00000042
depends:        hid,usbhid
retpoline:      Y
name:           hid_uclogic
vermagic:       5.6.13-arch1-1 SMP preempt mod_unload 

The alias to my tablet is present.

9. Make sure the previous versions of the drivers are unloaded (tablet disconnected) :

sudo modprobe -r hid-kye hid-uclogic hid-polostar hid-viewsonic

10. And I rebooted also...

11. Check before connection of my tablet with lsmod | grep hid gives

hid_logitech_hidpp     45056  0
hid_logitech_dj        28672  0
hid_multitouch         32768  0
hid_generic            16384  0
usbhid                 65536  1 hid_logitech_dj
i2c_hid                32768  0
hid                   143360  6 i2c_hid,usbhid,hid_multitouch,hid_generic,hid_logitech_dj,hid_logitech_hidpp
intel_hid              24576  0
sparse_keymap          16384  2 intel_hid,dell_wmi
mac_hid                16384  0

12. Then, I connect USB cable of my XP PEN artist 12 Pro tablet. A new check with lsmod | grep hid gives

hid_uclogic            40960  0
hid_logitech_hidpp     45056  0
hid_logitech_dj        28672  0
hid_multitouch         32768  0
hid_generic            16384  0
usbhid                 65536  2 hid_uclogic,hid_logitech_dj
i2c_hid                32768  0
hid                   143360  7 i2c_hid,usbhid,hid_multitouch,hid_uclogic,hid_generic,hid_logitech_dj,hid_logitech_hidpp
intel_hid              24576  0
sparse_keymap          16384  2 intel_hid,dell_wmi
mac_hid                16384  0

so now, hid_uclogic is loaded. Great !!!

And xinput gives this :

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech M325                             id=11   [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Mouse                id=13   [slave  pointer  (2)]
⎜   ↳ DLL07BE:01 06CB:7A13 Touchpad             id=14   [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                   id=19   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Power Button                              id=9    [slave  keyboard (3)]
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]
    ↳ Intel HID events                          id=15   [slave  keyboard (3)]
    ↳ Intel HID 5 button array                  id=16   [slave  keyboard (3)]
    ↳ Dell WMI hotkeys                          id=17   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=18   [slave  keyboard (3)]
    ↳ Integrated_Webcam_HD: Integrate           id=12   [slave  keyboard (3)]
    ↳ UGTABLET 11.6 inch PenDisplay Pen         id=20   [slave  keyboard (3)]

If I approach the stylus of the tablet, it's not the same thing like before. xinput doesn't changes and stylus is not detected.

No problem for the HDMI display : it works after a
xrandr --output eDP-1 --scale 1x1 --mode 1920x1080 --output HDMI-1 --right-of eDP-1 --auto
for example.

13. Check with evtest : it shows only as UGTABLET things

/dev/input/event22:     UGTABLET 11.6 inch PenDisplay Pen
/dev/input/event23:     UGTABLET 11.6 inch PenDisplay Pad

If I select the Pen with 22 choice, it gives

Select the device event number [0-23]: 22
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x28bd product 0x91f version 0x100
Input device name: "UGTABLET 11.6 inch PenDisplay Pen"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 320 (BTN_TOOL_PEN)
    Event code 330 (BTN_TOUCH)
    Event code 331 (BTN_STYLUS)
    Event code 332 (BTN_STYLUS2)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max    25634
      Resolution     100
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max    14415
      Resolution     100
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max     8191
    Event code 26 (ABS_TILT_X)
      Value      0
      Min      -61
      Max       60
      Resolution      57
    Event code 27 (ABS_TILT_Y)
      Value      0
      Min      -61
      Max       60
      Resolution      57
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Properties:
  Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)

and nothing is catched when I play with the pen or the pad buttons.

If I select the Pen with 22 choice, it gives

Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x28bd product 0x91f version 0x100
Input device name: "UGTABLET 11.6 inch PenDisplay Pad"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 256 (BTN_0)
    Event code 257 (BTN_1)
    Event code 258 (BTN_2)
    Event code 259 (BTN_3)
    Event code 260 (BTN_4)
    Event code 261 (BTN_5)
    Event code 262 (BTN_6)
    Event code 263 (BTN_7)
    Event code 264 (BTN_8)
    Event code 265 (BTN_9)
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Properties:
Testing ... (interrupt to exit)

and also nothing is catched when I play with the pen or the pad buttons.

14. Looking at Xorg.0.log shows this (shortened to the essential) :

[   101.814] (II) config/udev: Adding input device UGTABLET 11.6 inch PenDisplay Pen (/dev/input/mouse4)
[   101.814] (II) No input driver specified, ignoring this device.
[   101.814] (II) This device may have been added with another device file.
[   101.927] (II) config/udev: Adding input device UGTABLET 11.6 inch PenDisplay Pen (/dev/input/event22)
[   101.927] (**) UGTABLET 11.6 inch PenDisplay Pen: Applying InputClass "evdev tablet catchall"
[   101.927] (**) UGTABLET 11.6 inch PenDisplay Pen: Applying InputClass "libinput tablet catchall"
[   101.927] (II) Using input driver 'libinput' for 'UGTABLET 11.6 inch PenDisplay Pen'
[   101.927] (**) UGTABLET 11.6 inch PenDisplay Pen: always reports core events
[   101.928] (**) Option "Device" "/dev/input/event22"
[   101.928] (**) Option "_source" "server/udev"
[   101.987] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: is tagged by udev as: Tablet
[   102.015] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: tablet 'UGTABLET 11.6 inch PenDisplay Pen' unknown to libwacom
[   102.015] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: device is a tablet
[   102.015] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: device removed
[   102.058] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/0003:28BD:091F.0008/input/input39/event22"
[   102.058] (II) XINPUT: Adding extended input device "UGTABLET 11.6 inch PenDisplay Pen" (type: TABLET, id 20)
[   102.117] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: is tagged by udev as: Tablet
[   102.118] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: tablet 'UGTABLET 11.6 inch PenDisplay Pen' unknown to libwacom
[   102.119] (II) event22 - UGTABLET 11.6 inch PenDisplay Pen: device is a tablet
[   102.121] (II) config/udev: Adding input device UGTABLET 11.6 inch PenDisplay Pad (/dev/input/event23)
[   102.122] (II) No input driver specified, ignoring this device.
[   102.122] (II) This device may have been added with another device file.
[   283.326] (II) modeset(0): EDID vendor "SHP", prod id 5203
[   283.326] (II) modeset(0): Printing DDC gathered Modelines:
[   283.326] (II) modeset(0): Modeline "1920x1080"x0.0  138.50  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.6 kHz eP)
[   332.929] (II) modeset(0): EDID vendor "SHP", prod id 5203
[   332.929] (II) modeset(0): Printing DDC gathered Modelines:
[   332.929] (II) modeset(0): Modeline "1920x1080"x0.0  138.50  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.6 kHz eP)
[   338.238] (II) modeset(0): EDID vendor "SHP", prod id 5203
[   338.238] (II) modeset(0): Printing DDC gathered Modelines:
[   338.238] (II) modeset(0): Modeline "1920x1080"x0.0  138.50  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.6 kHz eP)
[   338.858] (II) modeset(0): EDID vendor "SHP", prod id 5203
[   338.858] (II) modeset(0): Printing DDC gathered Modelines:
[   338.858] (II) modeset(0): Modeline "1920x1080"x0.0  138.50  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.6 kHz eP)
[   339.166] (II) event18 - DLL07BE:01 06CB:7A13 Touchpad: SYN_DROPPED event - some input events have been lost.
[   355.374] (II) modeset(0): Allocate new frame buffer 3840x1080 stride
[   361.566] (II) modeset(0): EDID vendor "SHP", prod id 5203
[   361.566] (II) modeset(0): Printing DDC gathered Modelines:
[   361.566] (II) modeset(0): Modeline "1920x1080"x0.0  138.50  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.6 kHz eP)
[   362.493] (II) modeset(0): EDID vendor "UGD", prod id 4354
[   362.493] (II) modeset(0): Using hsync ranges from config file
[   362.493] (II) modeset(0): Using vrefresh ranges from config file
[   362.493] (II) modeset(0): Printing DDC gathered Modelines:
[   362.493] (II) modeset(0): Modeline "1920x1080"x0.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
[   362.493] (II) modeset(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
[   362.493] (II) modeset(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
[   362.493] (II) modeset(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[   362.493] (II) modeset(0): Modeline "1152x648"x60.0   59.91  1152 1200 1320 1488  648 649 652 671 -hsync +vsync (40.3 kHz e)
[   362.493] (II) modeset(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
[   362.493] (II) modeset(0): Modeline "1280x720"x60.0   74.48  1280 1336 1472 1664  720 721 724 746 -hsync +vsync (44.8 kHz e)
[   362.493] (II) modeset(0): Modeline "1366x768"x59.8   84.75  1366 1431 1567 1776  768 771 781 798 -hsync +vsync (47.7 kHz e)
[   362.493] (II) modeset(0): Modeline "1440x900"x0.0   88.75  1440 1488 1520 1600  900 903 909 926 +hsync -vsync (55.5 kHz e)
[   362.493] (II) modeset(0): Modeline "256x192"x60.0    3.26  256 240 264 272  192 193 196 200 -hsync +vsync (12.0 kHz e)
[   362.493] (II) modeset(0): Modeline "1680x1050"x61.0  149.59  1680 1784 1968 2256  1050 1051 1054 1087 -hsync +vsync (66.3 kHz e)

Here is the output of journalctl about the tablet :

mai 18 11:30:16 xps kernel: usb 1-2: new full-speed USB device number 5 using xhci_hcd
mai 18 11:30:16 xps kernel: usb 1-2: new full-speed USB device number 5 using xhci_hcd
mai 18 11:30:16 xps kernel: usb 1-2: new full-speed USB device number 5 using xhci_hcd
mai 18 11:30:16 xps kernel: usb 1-2: New USB device found, idVendor=28bd, idProduct=091f, bcdDevice= 0.00
mai 18 11:30:16 xps kernel: usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
mai 18 11:30:16 xps kernel: usb 1-2: Product: 11.6 inch PenDisplay
mai 18 11:30:16 xps kernel: usb 1-2: Manufacturer: UGTABLET
mai 18 11:30:16 xps kernel: usb 1-2: SerialNumber: 000000
mai 18 11:30:16 xps kernel: input: UGTABLET 11.6 inch PenDisplay Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:28BD:091F.0006/input/input36
mai 18 11:30:16 xps kernel: input: UGTABLET 11.6 inch PenDisplay Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:28BD:091F.0006/input/input37
mai 18 11:30:16 xps kernel: hid-generic 0003:28BD:091F.0006: input,hidraw3: USB HID v1.00 Mouse [UGTABLET 11.6 inch PenDisplay] on usb-0000:00:14.0-2/input0
mai 18 11:30:16 xps kernel: input: UGTABLET 11.6 inch PenDisplay as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.1/0003:28BD:091F.0007/input/input38
mai 18 11:30:16 xps kernel: hid-generic 0003:28BD:091F.0007: input,hidraw4: USB HID v1.00 Device [UGTABLET 11.6 inch PenDisplay] on usb-0000:00:14.0-2/input1
mai 18 11:30:16 xps kernel: hid-generic 0003:28BD:091F.0008: hiddev1,hidraw5: USB HID v1.00 Device [UGTABLET 11.6 inch PenDisplay] on usb-0000:00:14.0-2/input2
mai 18 11:30:16 xps mtp-probe[2336]: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
mai 18 11:30:16 xps mtp-probe[2336]: bus: 1, device: 5 was not an MTP device
mai 18 11:30:16 xps acpid[661]: input device has been disconnected, fd 15
mai 18 11:30:17 xps kernel: uclogic 0003:28BD:091F.0006: interface is invalid, ignoring
mai 18 11:30:17 xps kernel: uclogic 0003:28BD:091F.0007: interface is invalid, ignoring
mai 18 11:30:17 xps kernel: input: UGTABLET 11.6 inch PenDisplay Pen as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/0003:28BD:091F.0008/input/input39
mai 18 11:30:17 xps kernel: input: UGTABLET 11.6 inch PenDisplay Pad as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/0003:28BD:091F.0008/input/input40
mai 18 11:30:17 xps kernel: uclogic 0003:28BD:091F.0008: input,hidraw3: USB HID v1.00 Keypad [UGTABLET 11.6 inch PenDisplay] on usb-0000:00:14.0-2/input2
mai 18 11:30:17 xps hid-rebind[2421]: rebinding /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:28BD:091F.0006 to "uclogic" driver
mai 18 11:30:17 xps hid-rebind[2422]: rebinding /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.1/0003:28BD:091F.0007 to "uclogic" driver
mai 18 11:30:17 xps kernel: uclogic 0003:28BD:091F.0006: interface is invalid, ignoring
mai 18 11:30:17 xps kernel: uclogic 0003:28BD:091F.0007: interface is invalid, ignoring
mai 18 11:30:17 xps mtp-probe[2436]: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
mai 18 11:30:17 xps mtp-probe[2436]: bus: 1, device: 5 was not an MTP device
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received
mai 18 11:32:21 xps kernel: usb 1-2: input irq status -75 received

The last line with input irq status -75 repeated many many many times... It's made each I time I played with stylus or pad buttons... :-( These messages disappeared after disconnecting/reconnecting the tablet but stylus and pad buttons still doesn't work.

So, something is wrong... "Zut !" (as we say in french). If you have ideas to progress on this... Thanks !

[alfazaz]

I don't know if it's useful but I read these rdesc in /sys/kernel/debug/hid/ :

• For 0003:28BD:091F.001B :

05 01 09 02 a1 01 85 09 09 01 a1 00 05 09 19 01 29 03 15 00 25 01 95 03 75 01 81 02 95 05 81 01 05 01 09 30 09 31 26 ff 7f 95 02 75 10 81 02 05 0d 09 30 26 ff 07 95 01 75 10 81 02 c0 c0 05 01 09 02 a1 01 09 01 a1 00 85 01 05 09 19 01 29 05 95 05 75 01 15 00 25 01 81 02 95 03 81 01 05 01 09 30 09 31 95 02 75 10 16 00 80 26 ff 7f 81 06 09 38 15 81 25 7f 95 01 75 08 81 06 05 0c 0a 38 02 95 01 75 08 81 06 c0 c0 05 01 09 06 a1 01 85 06 05 07 19 e0 29 e7 15 00 25 01 75 01 95 08 81 02 05 07 19 00 29 ff 26 ff 00 75 08 95 06 81 00 c0

• For 0003:28BD:091F.001C :

05 0d 09 02 a1 01 85 07 09 20 a1 00 09 42 09 44 09 45 15 00 25 01 75 01 95 03 81 02 95 02 81 03 09 32 95 01 81 02 95 02 81 03 75 10 95 01 35 00 a4 05 01 09 30 65 13 55 0d 46 6c 27 26 ff 7f 81 02 09 31 46 2b 16 26 ff 7f 81 02 b4 09 30 45 00 26 ff 1f 81 42 09 3d 15 81 25 7f 75 08 95 01 81 02 09 3e 15 81 25 7f 81 02 c0 c0

• For 0003:28BD:091F.001D :

05 0d 09 02 a1 01 85 02 09 20 a0 14 25 01 09 42 09 44 09 46 75 01 95 03 81 02 95 02 81 01 09 32 95 01 81 02 95 02 81 01 75 10 95 01 a4 05 01 55 fd 65 13 34 09 30 27 22 64 00 00 47 6c 27 00 00 81 02 09 31 27 4f 38 00 00 47 2b 16 00 00 81 02 b4 09 30 27 ff 1f 00 00 81 02 a4 54 65 14 35 c3 45 3c 15 c3 25 3c 75 08 95 02 09 3d 09 3e 81 02 b4 c0 c0 05 01 09 07 a1 01 85 f7 05 0d 09 39 a0 14 25 01 75 01 95 08 81 01 05 09 19 01 29 08 95 08 81 02 95 20 81 01 19 09 29 0a 95 02 81 02 95 16 81 01 c0 c0 

  INPUT(2)[INPUT]
    Field(0)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(3)
        Digitizers.TipSwitch
        Digitizers.BarrelSwitch
        Digitizers.TabletPick
      Logical Minimum(0)
      Logical Maximum(1)
      Report Size(1)
      Report Count(3)
      Report Offset(0)
      Flags( Variable Absolute )
    Field(1)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(1)
        Digitizers.InRange
      Logical Minimum(0)
      Logical Maximum(1)
      Report Size(1)
      Report Count(1)
      Report Offset(5)
      Flags( Variable Absolute )
    Field(2)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(1)
        GenericDesktop.X
      Logical Minimum(0)
      Logical Maximum(25634)
      Physical Minimum(0)
      Physical Maximum(10092)
      Unit Exponent(-3)
      Unit(English Linear : Inch)
      Report Size(16)
      Report Count(1)
      Report Offset(8)
      Flags( Variable Absolute )
    Field(3)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(1)
        GenericDesktop.Y
      Logical Minimum(0)
      Logical Maximum(14415)
      Physical Minimum(0)
      Physical Maximum(5675)
      Unit Exponent(-3)
      Unit(English Linear : Inch)
      Report Size(16)
      Report Count(1)
      Report Offset(24)
      Flags( Variable Absolute )
    Field(4)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(1)
        Digitizers.TipPressure
      Logical Minimum(0)
      Logical Maximum(8191)
      Report Size(16)
      Report Count(1)
      Report Offset(40)
      Flags( Variable Absolute )
    Field(5)
      Physical(Digitizers.Stylus)
      Application(Digitizers.Pen)
      Usage(2)
        Digitizers.003d
        Digitizers.003e
      Logical Minimum(-61)
      Logical Maximum(60)
      Physical Minimum(-61)
      Physical Maximum(60)
      Unit(English Rotation : Degrees)
      Report Size(8)
      Report Count(2)
      Report Offset(56)
      Flags( Variable Absolute )
  INPUT(247)[INPUT]
    Field(0)
      Physical(Digitizers.TabletFunctionKey)
      Application(GenericDesktop.Keypad)
      Usage(8)
        Button.0001
        Button.0002
        Button.0003
        Button.0004
        Button.0005
        Button.0006
        Button.0007
        Button.0008
      Logical Minimum(0)
      Logical Maximum(1)
      Report Size(1)
      Report Count(8)
      Report Offset(8)
      Flags( Variable Absolute )
    Field(1)
      Physical(Digitizers.TabletFunctionKey)
      Application(GenericDesktop.Keypad)
      Usage(2)
        Button.0009
        Button.000a
      Logical Minimum(0)
      Logical Maximum(1)
      Report Size(1)
      Report Count(2)
      Report Offset(48)
      Flags( Variable Absolute )

Digitizers.TipSwitch ---> Key.Touch
Digitizers.BarrelSwitch ---> Key.Stylus
Digitizers.TabletPick ---> Key.Stylus2
Digitizers.InRange ---> Key.ToolPen
GenericDesktop.X ---> Absolute.X
GenericDesktop.Y ---> Absolute.Y
Digitizers.TipPressure ---> Absolute.Pressure
Digitizers.003d ---> Absolute.XTilt
Digitizers.003e ---> Absolute.YTilt
Button.0001 ---> Key.Btn0
Button.0002 ---> Key.Btn1
Button.0003 ---> Key.Btn2
Button.0004 ---> Key.Btn3
Button.0005 ---> Key.Btn4
Button.0006 ---> Key.Btn5
Button.0007 ---> Key.Btn6
Button.0008 ---> Key.Btn7
Button.0009 ---> Key.Btn8
Button.000a ---> Key.Btn9

[alfazaz]

Tried to adapt uclogic_rdesc_xppen_a156p_pen_arr and uclogic_rdesc_xppen_a156p_frame_arr in hid-uclogic-rdesc.c for the Artist 12 Pro using my rdesc but still getting input irq status -75 received when moving stylus or playing tablet buttons (no reaction of stylus buttons also)...

I don't know how to proceed to debug this. 😞

[alfazaz]

Logs in journalctl in debug mode for hid_uclogic module without changing rdesc content (so using Artist 15.6 Pro rdesc for my Artist 12 Pro rdesc) and on connection :

logs.txt

After this, only this concerning the tablet with xinput :

 ↳ UGTABLET 11.6 inch PenDisplay Pen         id=20   [slave  keyboard (3)]

For evtest, only these :

/dev/input/event22:     UGTABLET 11.6 inch PenDisplay Pen
/dev/input/event23:     UGTABLET 11.6 inch PenDisplay Pad

and nothing detected in events on 22 and 23 device... :-(

Note : I saw with wireshark the same thing written in #286 (comment) about init packet for example (same values...).

@Korvox If one day you have time to help (or to give guidelines to debug like you did for your tablet)... I really think that these tablets are close when I read your messages about 15.6 Pro...

[alfazaz]

Another day on this tablet and still the hell... :-(

I don't understand where it goes wrong.

Using the Artist 15.6 Pro rdesc of Korvox, I get this with sudo usbhid-dump -es -m 28bd:091f at start and when approaching/touching/releasing the pen :

Starting dumping interrupt transfer stream
with 1 minute timeout.

001:012:000:STREAM             1590178740.879005
 02 B1 04 00 00 00 00 00

001:012:002:STREAM             1590178740.880577
 02 F0 00 00 00 00 00 00 00 00 00 00

001:012:002:STREAM             1590178745.704729
 02 A0 B0 20 1D 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.708610
 02 A0 B0 20 1D 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.714739
 02 A0 BA 20 2D 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.718741
 02 A0 C0 20 36 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.722708
 02 A0 D1 20 50 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.728607
 02 A0 DB 20 65 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.732704
 02 A0 EC 20 7E 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.736696
 02 A0 FD 20 97 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.742759
 02 A0 0A 21 AB 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.746601
 02 A0 1C 21 C5 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.750692
 02 A0 2D 21 E0 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.760654
 02 A1 3D 21 FC 14 8B 05 00 00 00 00

001:012:002:STREAM             1590178745.764587
 02 A1 3E 21 07 15 5B 09 00 00 00 00

001:012:002:STREAM             1590178745.770609
 02 A1 3C 21 0F 15 27 0B 00 00 00 00

001:012:002:STREAM             1590178745.774725
 02 A1 39 21 16 15 22 0C 00 00 00 00

001:012:002:STREAM             1590178745.778663
 02 A1 35 21 1C 15 9A 0C 00 00 00 00

001:012:002:STREAM             1590178745.784730
 02 A1 32 21 20 15 D3 0C 00 00 00 00

001:012:002:STREAM             1590178745.788616
 02 A1 30 21 24 15 ED 0C 00 00 00 00

001:012:002:STREAM             1590178745.792598
 02 A1 2E 21 28 15 F6 0C 00 00 00 00

001:012:002:STREAM             1590178745.798629
 02 A1 2C 21 2B 15 F6 0C 00 00 00 00

001:012:002:STREAM             1590178745.802550
 02 A1 2A 21 2E 15 EA 0C 00 00 00 00

001:012:002:STREAM             1590178745.806598
 02 A1 28 21 30 15 D7 0C 00 00 00 00

001:012:002:STREAM             1590178745.812717
 02 A1 28 21 30 15 B5 0C 00 00 00 00

001:012:002:STREAM             1590178745.816717
 02 A1 25 21 33 15 7F 0C 00 00 00 00

001:012:002:STREAM             1590178745.820723
 02 A1 25 21 33 15 32 0C 00 00 00 00

001:012:002:STREAM             1590178745.826734
 02 A1 23 21 37 15 C5 0B 00 00 00 00

001:012:002:STREAM             1590178745.830735
 02 A1 23 21 37 15 3B 0B 00 00 00 00

001:012:002:STREAM             1590178745.834609
 02 A1 23 21 37 15 92 0A 00 00 00 00

001:012:002:STREAM             1590178745.840735
 02 A1 23 21 37 15 B0 09 00 00 00 00

001:012:002:STREAM             1590178745.844632
 02 A1 29 21 3B 15 12 08 00 00 00 00

001:012:002:STREAM             1590178745.848668
 02 A1 30 21 3A 15 B9 06 00 00 00 00

001:012:002:STREAM             1590178745.854734
 02 A1 3C 21 37 15 99 05 00 00 00 00

001:012:002:STREAM             1590178745.858717
 02 A0 48 21 32 15 00 00 00 00 00 00

001:012:002:STREAM             1590178745.862606
 02 A0 63 21 23 15 00 00 00 00 00 00

001:012:002:STREAM             1590178745.868612
 02 A0 78 21 0D 15 00 00 00 00 00 00

001:012:002:STREAM             1590178745.872703
 02 A0 83 21 FA 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.876716
 02 A0 88 21 E7 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.882703
 02 A0 87 21 D3 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.886718
 02 A0 7C 21 AE 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.890600
 02 A0 6C 21 8A 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.894720
 02 A0 6C 21 8A 14 00 00 00 00 00 00

001:012:002:STREAM             1590178745.902711
 02 C0 6C 21 8A 14 00 00 00 00 00 00

but evtest doesn't react... It gives with Pen input no more things than the following :

Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x28bd product 0x91f version 0x100
Input device name: "UGTABLET 11.6 inch PenDisplay Pen"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 320 (BTN_TOOL_PEN)
    Event code 330 (BTN_TOUCH)
    Event code 331 (BTN_STYLUS)
    Event code 332 (BTN_STYLUS2)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max    25634
      Resolution     100
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max    14415
      Resolution     100
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max     8191
    Event code 26 (ABS_TILT_X)
      Value      0
      Min      -61
      Max       60
      Resolution      57
    Event code 27 (ABS_TILT_Y)
      Value      0
      Min      -61
      Max       60
      Resolution      57
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Properties:
  Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)

How can I debug this ???