Debian 9 touch screen calibration (ENG)

Touchscreen mouse calibration is tested for the following OS:

• Description: Debian GNU/Linux 9.1 (stretch)
• Release: 9.1
• ernel: Linux 4.9.0-3-686-pae
• Architecture: x86

For touch screen we can use libinput or evdev driver. Libinput replaces the evdev driver. The configuration below is created for evdev. In the other words We use evdev.

• Get information about xserver-xorg-input.

dpkg -l | grep xserver-xorg-input

Result:

As we see there is no evdev driver.

• Let's install evdev driver.

apt-get install xserver-xorg-input-evdev

• Check if evdev driver is installed

dpkg -l | grep xserver-xorg-input

Result:

• Check if configuration files are in /usr/share/X11/xorg.conf.d directory.

cd /usr/share/X11/xorg.conf.d
ls

result:

 

10-amdgpu.conf 10-evdev.conf 10-quirks.conf 40-libinput.conf 70-wacom.conf 

• now remove libinput driver or we can just remove touch screen section from libinput driver configuration file.

in order to remove libinput driver with dependent packages:

 

apt-get remove --auto-remove xserver-xorg-input-libinput

in order to disable libinput touch scree:

open 40-libinput.conf and remove a touchscreen InputClass Section that is shown in image below.

• now install xinput-calibrator

sudo apt-get install xinput-calibrator

• Check if you need to swap axes. if you need to swap just run:

xinit set-int-prop "eGalax Inc." "Evdev Axes Swap" 8 1

• Run calibrator to get correct x,y positions.

 

xinput_calibrator --output-type xinput

The result will be like this:

Now everything should be fine, but if we want to make calibration permanent (after system restart),  open 10-evdev.conf config, find touch screen section and add "Calibration" and "SwapAxes" entries.

If we don't want to touch evdev configuration we can run the folloing command after X11 load:

xinput set-prop "eGalax Inc." "Evdev Axis Calibration" 1543, 222, 409, 1582
xinput set-prop "eGalax Inc." "Evdev Axes Swap" 1 

if you want to configure libinput instead of evdev, remove evdev driver and install lib input if the last one is removed:

dpkg -P xserver-xorg-input-evdev
apt-get install xserver-xorg-input-libinput