Continuing the discussion from Changing brighness via shortcut fails to change screen brighness:
On my laptop manufacturer’s website there are instructions (see https://www.tuxedocomputers.com/en/Infos/Help-Support/Instructions/Brightness-for-120-Hz-and-144-Hz-displays_1.tuxedo) to fix brightness control failures in a system using
grub, but I do not know how to apply this to the different booting architecture of Qubes OS, since the file
/etc/default/grub does not exist in Qubes OS and I am not familiar with the Qubes OS boot architecture.
The instructions on the website are the following:
sudo nano /etc/default/grub
- add the parameters
acpi_osi= acpi_os_name=Linux i915.enable_dpcd_backlightto the variable
Does anyone know where these parameters and/or their values or adapted parameters/values can be placed in the Qubes OS system to have the same effect?