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ebray187
Tux's lil' helper
Joined: 02 Mar 2005
Posts: 121
Location: Al otro lado de la pantalla
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 Posted: Thu Feb 11, 2021 12:57 am Post subject: [How to] Gaomon/Generic drawing tablets |
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I want to share this little tutorial for future reference and to help those who have had troubles setting up these cheap but otherwise excellent drawing tablets. A Gaomon s620 bought on aliexpress in my case.
TOC:- Installing the drivers
- Config the tablet
- The setup script
- Autorunning the script with udev
1. Installing the drivers
Unfortunately we will have to install the drivers outside portage because we don't have a DIGImend package yet (02/10/2021).
First, unplug the tablet, and download the driver (v10): https://github.com/DIGImend/digimend-kernel-drivers/releases
Unzip and then compile: | Code: | digimend-kernel-drivers-10 $ make
digimend-kernel-drivers-10 # make install |
If everything went ok, for simplicity just reboot.
Note: When upgrading the kernel we will have to manually reconfigure the drivers: $ make clean then compile and install again.
Now the driver should be operational, so connect the tablet and the system should recognize it. In my case KDE show a corresponding notification (with kde-misc/wacomtablet package installed).
Also xsetwacom should be able to list the device: | Code: | $ xsetwacom list
GAOMON Gaomon Tablet stylus id: 18 type: STYLUS
GAOMON Gaomon Tablet Touch Strip pad id: 21 type: PAD
GAOMON Gaomon Tablet Pad pad id: 22 type: PAD |
2. Config the tablet
In KDE the area can be config inside System Preferences → Input Devices → Graphic Tablet
Otherwise you could set it through these commands:
First get the <NAME> with: $ xsetwacom list, then to get the max area values: | Code: | $ xsetwacom get "GAOMON Gaomon Tablet stylus" Area
0 0 33020 20320 |
The command to setup the area is this: | Code: | | $ xsetwacom set <NAME> Area <L> <T> <R> <B> |
<L> and <T> are the coordinates of the first point (left-top corner, 0 0 min values) and <R> <B> are the coordinates of the second point of the drawing area (right-bottom corner, max values are 33020 20320 in this case).
So with a little math you can define the coordinates so that they are proportional to the 1920x1080 16:9 screen and the area is centered on the vertical axis of the tablet. For the hurried and/or the lazy: | Code: | | $ xsetwacom set "GAOMON Gaomon Tablet stylus" Area 0 873 33020 19447 |
For the buttons i couldn't set the meta key for my shorcuts with KDE, but no problem it can be done manually directly with xsetwacom:
| Code: | | $ xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 3 key Super Ctrl 2 |
Notes:
- The button numbers are generally as follow: 1, 2, 3, 8, 9, 10, 11, etc...
- For more info $ man xsetwacom
3. The Setup Script
At this point making our own script that configures the buttons (and the area) should be a simple process: $ nano gaomon_s620.sh
| Code: | #!/bin/bash
#Drawing Area
#xsetwacom set "GAOMON Gaomon Tablet stylus" Area 0 873 33020 19447
#Express Buttons
xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 1 key Ctrl z
xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 2 key 2
xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 3 key Super Ctrl 2
xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 8 key Super Ctrl 1 |
Remember to give execution permissions to the file $ chmod +x gaomon_s620.sh
4. Autorunning the script with udev
For the script to work automatically when connecting the tablet, we could add a udev rule. This process can be a little tricky so here are my conclutions.
The first thing we need is get some device info. Unplugg the device and run: | Code: | | # udevadm monitor --environment --udev |
Then connect the tablet (ctrl + c to end the monitor). It should show a lot of information about the device:
| Code: | monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
UDEV [8742.051108] add /devices/pci0000:00/0000:00:1a.2/usb5/5-2 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.2/usb5/5-2
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/005/005
DEVTYPE=usb_device
PRODUCT=256c/6d/100
TYPE=0/0/0
BUSNUM=005
DEVNUM=005
SEQNUM=3566
USEC_INITIALIZED=8742041029
ID_VENDOR=GAOMON
ID_VENDOR_ENC=GAOMON
ID_VENDOR_ID=256c
ID_MODEL=Gaomon_Tablet
ID_MODEL_ENC=Gaomon\x20Tablet
ID_MODEL_ID=006d
ID_REVISION=0100
ID_SERIAL=GAOMON_Gaomon_Tablet
ID_BUS=usb
ID_USB_INTERFACES=:030102:
ID_PATH=pci-0000:00:1a.2-usb-0:2
ID_PATH_TAG=pci-0000_00_1a_2-usb-0_2
ID_FOR_SEAT=usb-pci-0000_00_1a_2-usb-0_2
DRIVER=usb
MAJOR=189
MINOR=516
... |
Take note of the values in ACTION, SUBSYSTEM, ID_VENDOR_ID and ID_MODEL_ID. With this we can make the udev rule that executes our script: # nano /etc/udev/rules.d/90-local.rules
| Code: | | ACTION=="add", SUBSYSTEM=="usb", ENV{ID_VENDOR_ID}=="256c", ENV{ID_MODEL_ID}=="006d", RUN+="/usr/local/bin/tablet_setup.sh" |
This should run, every time the tablet is connected, the script tablet_setup.sh inside /usr/local/bin/
But with udev things are not as simple at its seem. The script must run after the system configures the tablet, so we are goint to use tablet_setup.sh as a wrapper script that launch our config script in the background: # nano /usr/local/bin/tablet_setup.sh | Code: | #!/bin/bash
/usr/local/bin/gaomon_s620.sh & |
Also we need to modify the script to avoid permission, changing id and display problems:# nano /usr/local/bin/gaomon_s620.sh | Code: | #!/bin/bash
sleep 1
export XAUTHORITY=/home/username/.Xauthority
export DISPLAY=:0
#xsetwacom commands here:
/usr/bin/xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 1 key Ctrl z
/usr/bin/xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 2 key 2
/usr/bin/xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 3 key Super Ctrl 2
/usr/bin/xsetwacom set "GAOMON Gaomon Tablet Pad pad" button 8 key Super Ctrl 1 |
Now finally after a reboot everything must be ok.
Great!
References:
https://github.com/DIGImend/digimend-kernel-drivers
https://wiki.gentoo.org/wiki/Udev
https://wiki.archlinux.org/index.php/Udev
https://osu.ppy.sh/community/forums/topics/1122479
https://unix.stackexchange.com/questions/65788/why-doesnt-xsetwacom-work-from-udev
_________________
# emerge -C world >> 9/8
A flower?!
Last edited by ebray187 on Wed Jul 27, 2022 5:26 pm; edited 8 times in total |
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fedeliallalinea
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Joined: 08 Mar 2003
Posts: 31325
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| Posted: Thu Feb 11, 2021 6:48 am Post subject: |
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Moved from Kernel & Hardware to Documentation, Tips & Tricks.
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