Related but non-functional: Is there a software utility to adjust screen gamma/brightness/contrast?
$ cat /etc/lsb-release DISTRIB_ID=UbuntuDISTRIB_RELEASE=22.04DISTRIB_CODENAME=jammyDISTRIB_DESCRIPTION="Ubuntu 22.04.5 LTS"$ xrandr --listmonitorsMonitors: 1 0: +*XWAYLAND0 1920/340x1080/190+0+0 XWAYLAND0$ xrandr --output XWAYLAND0 --gamma 10:10:10# does nothing$ xgamma -gamma 10-> Red 1.000, Green 1.000, Blue 1.000<- Red 1.000, Green 1.000, Blue 1.000# does nothing$ redshift -ov -g 0.1.:0.1:0.1 -m randrTemperatures: 6500K at day, 4500K at nightBrightness: 1.00:1.00Gamma (Daytime): 0.100, 0.100, 0.100Gamma (Night): 0.100, 0.100, 0.100Period: DaytimeColor temperature: 6500KBrightness: 1.00# does nothing$ redshift -ov -g 10.:10:10 -m waylandTemperatures: 6500K at day, 4500K at nightBrightness: 1.00:1.00Gamma (Daytime): 10.000, 10.000, 10.000Gamma (Night): 10.000, 10.000, 10.000Failed to start adjustment method wayland.May or may not be causative:
$ dmesg[87497.277737] acer_wmi: Unknown function number - 8 - 1[87511.857920] acer_wmi: Unknown function number - 8 - 0[87512.550997] acer_wmi: Unknown function number - 8 - 1[88099.324821] acer_wmi: Unknown function number - 8 - 0[88101.309864] acer_wmi: Unknown function number - 8 - 1[88568.169127] acer_wmi: Unknown function number - 8 - 0[88632.570716] acer_wmi: Unknown function number - 8 - 1[88706.039734] acer_wmi: Unknown function number - 8 - 0[88708.855773] acer_wmi: Unknown function number - 8 - 1[88709.966779] acer_wmi: Unknown function number - 8 - 0[88737.919422] acer_wmi: Unknown function number - 8 - 1[88738.219316] acer_wmi: Unknown function number - 8 - 0