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5hridhyan

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Registered: 2025-12-25

Posts: 794

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Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

I see, what if you ran

xinput set-prop "Fujitsu Component USB Touch Panel" "Coordinate Transformation Matrix" 1.09715 0 -0.06089 0 1.12394 -0.06306 0 0 1

?

Edit:
I calculated like this

scale_x = 65535 / (63369 - 3637) ≈ 1.097
offset_x = -3637 / (63369 - 3637) ≈ -0.0609

scale_y = 65535 /(61985 - 3677) ≈ 1.124
offset_y = -3677 / (61985 - 3677) ≈ -0.0631

Last edited by 5hridhyan (2026-05-26 15:43:16)

UliteXD

Member

Registered: 2026-05-18

Posts: 30

Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

That actually worked! It's a little off on some corners but that's due to me loosely clicking the crosses, I'm going to recalculate it, and edit this post with the correct values, so that when you give me the script it is perfectly calibrated.

Edit:
I think I did something wrong when calculating the thing, because it is no longer calibrated. here is what I did:

output of xinput_calibrator:

Calibrating standard Xorg driver "Fujitsu Component USB Touch Panel"
        current calibration values: min_x=0, max_x=65535 and min_y=0, max_y=65535
        If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).


--> Making the calibration permanent <--
  copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf'
Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "Fujitsu Component USB Touch Panel"
        Option  "MinX"  "202"
        Option  "MaxX"  "65652"
        Option  "MinY"  "242"
        Option  "MaxY"  "65548"
EndSection

My math:

scale_x= 1.0012987013
offset_x= -0.00308632543927

scale_y = 1.00350656907
offset_y = -0.00370563194806

The command:

xinput set-prop "Fujitsu Component USB Touch Panel" "Coordinate Transformation Matrix" 1.0012987013 0 -0.00308632543927 0 1.00350656907 -0.00370563194806 0 0 1

Last edited by UliteXD (2026-05-26 16:18:13)

UliteXD

Member

Registered: 2026-05-18

Posts: 30

Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

I have been trying a few more times to calculate the same thing but I don't think I am doing it correctly since every time the screen is more warped

5hridhyan

Member

Registered: 2025-12-25

Posts: 794

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Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

the math is correct, but the value you took/given by xinput_calib is kinda not good, anyways, usually the command you ran  is temporary, a reboot should reset the state
and the value you took might not be "accurate" as a previous matrix was applied? in any case, before running `xinput_calibrator` make sure the matrix is set to the default, ig.
"1 0 0 0 1 0 0 0 1", and THEN run and calculate, since "1.09715 0 -0.06089 0 1.12394 -0.06306 0 0 1" worked for you, Im going to take it as a example
create a file like smtg ends with .sh (eg. meow.sh), and then paste:

#!/bin/bash
sleep 4
xinput set-prop "Fujitsu Component USB Touch Panel" "Coordinate Transformation Matrix" 1.09715 0 -0.06089 0 1.12394 -0.06306 0 0 1

and then give it executable permission by running `chmod +x ~/meow.sh`
in KDE settings, scroll down to autostart, and select Add login script , and browse and select your .sh
and you should be good to go

UliteXD

Member

Registered: 2026-05-18

Posts: 30

Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

That worked! Thank you very much for your patience and for your help. I really appreciate it.

5hridhyan

Member

Registered: 2025-12-25

Posts: 794

Website

Re: [SOLVED] Issues with touchscreen in panasonic toughbook cf-31

\o/

you can always calculate matrix w/ new data and update it in your script, but since it's working, just don't chase the 1:1 perfection