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docs: update touch calibration

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alfrix 2024-03-03 15:46:30 -03:00
parent 8db8df99f0
commit 2d5936bd09
1 changed files with 60 additions and 85 deletions
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145
docs/Troubleshooting/Touch_issues.md
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@ -80,6 +80,11 @@ You can test a change by running:
DISPLAY=:0 xinput set-prop "<device name>" 'Coordinate Transformation Matrix' <matrix>
```
!!! example
```sh
DISPLAY=:0 xinput set-prop "ADS7846 Touchscreen" 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1
```
Where the matrix can be one of the following options:
| Rotation | Matrix |
@ -92,72 +97,7 @@ Where the matrix can be one of the following options:
| invert X | `-1 0 1 0 1 0 0 0 1` |
| expand to twice the size horizontally | `0.5 0 0 0 1 0 0 0 1` |
For more in-depth guidance on using Coordinate Transformation Matrices:
* [Ubuntu wiki InputCoordinateTransformation](https://wiki.ubuntu.com/X/InputCoordinateTransformation)
* [Libinput docs](https://wayland.freedesktop.org/libinput/doc/1.9.0/absolute_axes.html)
To make this **permanent**, modify `/etc/udev/rules.d/51-touchscreen.rules`:
```bash
sudo nano /etc/udev/rules.d/51-touchscreen.rules
```
```sh title="51-touchscreen.rules"
ACTION=="add", ATTRS{name}=="<device name>", ENV{LIBINPUT_CALIBRATION_MATRIX}="<matrix>"
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
```sh
sudo reboot
```
!!! example
Test:
```sh
DISPLAY=:0 xinput set-prop "ADS7846 Touchscreen" 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1
```
Permanent modification:
```bash
sudo nano /etc/udev/rules.d/51-touchscreen.rules
```
```sh title="51-touchscreen.rules"
ACTION=="add", ATTRS{name}=="ADS7846 Touchscreen", ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 -1 1 0 0 1"
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
```sh
sudo reboot
```
!!! example "Alternative Example"
As an alternative **if the above doesn't work**:
```bash
sudo nano /usr/share/X11/xorg.conf.d/40-libinput.conf
```
```sh title="40-libinput.conf"
Section "InputClass"
Identifier "libinput touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Driver "libinput"
Option "TransformationMatrix" "0 -1 1 1 0 0 0 0 1"
EndSection
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
```sh
sudo reboot
```
To make the calibration permanent read [Save touch calibration](#save-touch-calibration)
## Touch calibration
@ -204,11 +144,7 @@ Reset the old calibration: (set the 0° roation matrix: 1 0 0 0 1 0 0 0 1)
```sh
DISPLAY=:0 xinput set-prop "ADS7846 Touchscreen" 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1
```
Run the calibrator - if it's not fullscreen cancel with `ctrl`+`c`
```sh
DISPLAY=:0 xtcal/xtcal
```
if the previous command was not fullscreen, adjust the geometry to cover the screen, for example:
Run the calibrator - if it's not fullscreen cancel with `ctrl`+`c` and adjust geometry
```sh
DISPLAY=:0 xtcal/xtcal -geometry 480x320
```
@ -228,25 +164,64 @@ DISPLAY=:0 xinput set-prop "ADS7846 Touchscreen" 'Coordinate Transformation Matr
```
if it's not correct reset the matrix and run xtcal again.
### Make it permanent
Open calibration file:
## Save touch calibration
modify `/etc/udev/rules.d/51-touchscreen.rules`:
```sh
sudo nano /usr/share/X11/xorg.conf.d/40-libinput.conf
sudo nano /etc/udev/rules.d/51-touchscreen.rules
```
Paste a section like this at the bottom,
replacing the transformation matrix numbers with the numbers of the calibrator output:
```sh title="40-libinput.conf"
Section "InputClass"
Identifier "libinput touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Driver "libinput"
Option "TransformationMatrix" "-0.016267 -0.952804 0.978336 -1.010164 0.065333 0.998316 0 0 1"
EndSection
```sh title="51-touchscreen.rules"
ACTION=="add", ATTRS{name}=="<device name>", ENV{LIBINPUT_CALIBRATION_MATRIX}="<matrix>"
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
test the persistency of the settings by rebooting
```sh
sudo reboot
```
!!! example
```sh
sudo nano /etc/udev/rules.d/51-touchscreen.rules
```
```sh title="51-touchscreen.rules"
ACTION=="add", ATTRS{name}=="ADS7846 Touchscreen", ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 -1 1 0 0 1"
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
```sh
sudo reboot
```
!!! example "Alternative Example"
As an alternative **if the above doesn't work**:
```bash
sudo nano /usr/share/X11/xorg.conf.d/40-libinput.conf
```
```sh title="40-libinput.conf"
Section "InputClass"
Identifier "libinput touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Driver "libinput"
Option "TransformationMatrix" "0 -1 1 1 0 0 0 0 1"
EndSection
```
Close the nano editor using `ctrl`+`x` (exit), then `y` for yes (save).
```sh
sudo reboot
```
For more in-depth guidance on using Coordinate Transformation Matrices:
* [Ubuntu wiki InputCoordinateTransformation](https://wiki.ubuntu.com/X/InputCoordinateTransformation)
* [Libinput docs](https://wayland.freedesktop.org/libinput/doc/1.9.0/absolute_axes.html)