GT-221 Pro - Tablet does not respond to input.

[bananapotsticker]

Hello!

Just for quick reference: I'm running KDE neon 5.14 with the x86_64 Linux 4.15.0-39-generic kernel and am attempting to get my GT-221 Pro working under it. I am by no means an expert and, in fact, have very little experience with this sort of thing as I've only recently begun trying to use linux to get away from Windows.

I've been struggling to get my GT-221 Pro working under linux and I've exhausted just about everything I could try. Basically no matter how I set up my config.ini it either spits out an error (because I think I'm setting the monitor setup wrong for multi-monitor) or it runs, but I can't get the tablet to respond to either pen input or by pressing any buttons. Also, yes, I have all my dependencies installed and yes, I added the /etc/X11/xorg.conf.d/evdev-tablet.conf

FYI: When I try to use one of the pre-made monitor configurations (or even not bother with multi-monitor at all and only have the tablet plugged in), the driver 'works' but the tablet still refuses to notice the pen or when I press any buttons.

Anyway. I'll attach the full config.ini but here's the part I wrote myself.

[monitor_4]
# 2 monitors arranged vertically with the tablet being the lower one.

screen_1W = 1920
screen_1H = 1080
screen_2W = 1920
screen_2H = 1080

total_screen_width   = ${screen_1W}
total_screen_height  = ${screen_1H} + ${screen_2H}
tablet_offset_x      = 0
tablet_offset_y      = {screen_1H}

xrandr_output1 = --output HDMI-A-0 --primary --mode 1920x1080 --pos 0x1080 --rotate normal
xrandr_output22 = --output DVI-D-0 --mode 1920x1080 --pos 0x0 --rotate normal
xrandr_args = ${xrandr_output1} ${xrandr_output2}

Here's the information for my monitors that I got from arandr:

#!/bin/sh
xrandr --output DisplayPort-0 --off --output DVI-D-0 --mode 1920x1080 --pos 0x0 --rotate normal --output DVI-D-1 --off --output HDMI-A-0 --primary --mode 1920x1080 --pos 0x1080 --rotate normal

Here's the output I get when I try to use [monitor_4]:

den@Ignition2:~/huion-linux-drivers$ sudo ./huion-tablet-driver.py
Finding USB device. . . Done!
Reading configuration. . . Traceback (most recent call last):
  File "./huion-tablet-driver.py", line 476, in <module>
    main.run()
  File "./huion-tablet-driver.py", line 27, in run
    read_config()
  File "./huion-tablet-driver.py", line 419, in read_config
    'xrandr_args').split("#",1)[0].strip()
  File "/usr/lib/python3.6/configparser.py", line 800, in get
    d)
  File "/usr/lib/python3.6/configparser.py", line 455, in before_get
    self._interpolate_some(parser, option, L, value, section, defaults, 1)
  File "/usr/lib/python3.6/configparser.py", line 507, in _interpolate_some
    option, section, rawval, ":".join(path)) from None
configparser.InterpolationMissingOptionError: Bad value substitution: option 'xrandr_args' in section 'monitor_2' contains an interpolation key 'xrandr_output2' which is not a valid option name. Raw value: '${xrandr_output1} ${xrandr_output2}'

And here's the output when the driver successfully runs (either from not using multimonitor or by using one of the pre-made configurations.)

den@Ignition2:~/huion-linux-drivers$ sudo ./huion-tablet-driver.py 
Finding USB device. . . Done!
Reading configuration. . . Done!
Preparing driver. . . Done!
--------------------------------------------------------------------------------
    |                Product: Tablet Monitor
 64 |        Params block #1: ??????
    |                          Max X: 37540
    |                          Max Y: 21120
    |                   Max pressure: 8191
    |                     Resolution: 2000
    |
 79 |         Internal model: 
 7b |         Buttons status: HK On
 c8 |        Params block #2: ????????
    |                          Max X: 95352
    |                          Max Y: 53645
    |                   Max pressure: 8191
    |                     Resolution: 5080
    |
 c9 |       Firmware version: HUION_M167_170623
 ca |  Internal manufacturer: HUION Animation Technology Co.,ltd
--------------------------------------------------------------------------------
Setting up driver. . . Done!
        Tablet model name     GT-221 PRO
        Buttons               ENABLED (10)
        Scrollbar             ENABLED (1)
        Desktop notifications ENABLED
        Multi Monitor Setup   disabled

Huion Kamvas driver should now be running

% Main Menu %
button 0 = [menu_krita]
button 1 = [menu_gimp]
button 2 = [menu_darktable]
button 3 = 
button 4 = 
button 5 = 
button 6 = 
button 7 = 
button 8 = key Return
button 9 = key Escape

Thanks for any help you can provide.

I'd like to note that using https://github.com/joseluis/HuionKamvasGT221PROLinuxDriver works, but I get no pen pressure.

arandr_output.txt config.txt

[Gijsjan]

A variable is missing: see this pull request: https://github.com/joseluis/huion-linux-drivers/pull/12

[joseluis]

Hi, I've updated the script, adding a new debug mode to get better debugging information.

Please try the new version after changing debug_mode = true in the config file, and paste back some of the lines that appear when you use the pen, like the following:

data[12] = array('B', [8, 128, 17, 88, 33, 145, 0, 0, 0, 0, 0, 0])
{'TYPE': 128, 'X': '[8]<<16+[3]<<8+[2]=22545', 'Y': '[5]<<8+[4]=37153', 'PRESS': '[7]<<8+[6]=0'}
data[12] = array('B', [8, 129, 26, 88, 184, 145, 250, 1, 0, 0, 0, 0])
{'TYPE': 129, 'X': '[8]<<16+[3]<<8+[2]=22554', 'Y': '[5]<<8+[4]=37304', 'PRESS': '[7]<<8+[6]=506'}
data[12] = array('B', [8, 129, 21, 88, 54, 146, 123, 6, 0, 0, 0, 0])
{'TYPE': 129, 'X': '[8]<<16+[3]<<8+[2]=22549', 'Y': '[5]<<8+[4]=37430', 'PRESS': '[7]<<8+[6]=1659'}
data[12] = array('B', [8, 129, 6, 88, 135, 146, 192, 10, 0, 0, 0, 0])
{'TYPE': 129, 'X': '[8]<<16+[3]<<8+[2]=22534', 'Y': '[5]<<8+[4]=37511', 'PRESS': '[7]<<8+[6]=2752'}