I have an external monitor connected to a machine with a built-in touchscreen display. When setting a 16:10 external display to mirror the 16:9 touchscreen display, we get black bars on the
Edit: We discovered the mis-match with mirrored monitors, but it is reproduce-able by setting a touchscreen display to a non-default aspect ratio. touchscreen, the input range for the touchscreen does not resize to match the output. I need to find a scriptable way to make this change for any (single) external display with any aspect ratio and without user input. I already have a udev rule that runs a python script to automatically set a monitor to mirror.
I need to configure this on Debian 11 and GNOME Shell 3.38.6 without disabling Wayland, though the issue is also on Debian 12 with GNOME Shell 43.6.
My digging so far has come to several solutions that seem to be specific to X11 and multiple places indicating that Wayland does not currently have the capability I need. I’ve tried using the archived
python-libinput and other recommendations to set a calibration matrix for
libinput, but have yet to get something to work. Any help, guidance, or direction would be greatly appreciated.
Edit: We discovered the mis-match with mirrored monitors, but it is reproduce-able by setting a touchscreen display to a non-default aspect ratio.