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The setup is as follows:

  • a common Gentoo linux based system image (has to be shared between all)
  • 1 out of 3 different touch based input devices
  • 1 out of 3 different monitors

There is always only one monitor and touch-input, but the combination can be arbitrary. So far not challenging, but two of the three monitors use a 90° rotation while the third requires a 270° rotation. In my old setup this was "solved" by having different Xorg.conf files for each combination, detecting the combination at boot-up and creating a symlink to the correct configuration via a script that was run to bring up X.

"InputClass" wildcards work very well to detect and configure the touch-input regardless which one is present; however I'm not faring that well with the monitor (I couldn't find anything like a "MonitorClass" for dynamic matching and I really don't want to have to use a pre-run script again..)

Is it possible to (ab)use the autoconfig features of Xorg to apply the rotation and build a dynamic setup based on the monitor that X detects?

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  • Maybe use xrandr in runtime, e.g. xsession scriptlets?
    – Michael Shigorin
    Commented Feb 7, 2019 at 16:39
  • 1
    Yeah that's what I ended up doing
    – Heals
    Commented Feb 7, 2019 at 16:46

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