Brightness on old laptop

Hardware Support
, ,
3

Hi,
after breaking X a few times (I owe a Tony George a beer for Timeshift), i found the solution, here for who has the same issue:

sudo gedit /etc/default/grub

change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

then

sudo update-grub

and reboot.

The only issue is that now brightness could reach 0% (completely black screen), hope to remind this :sweat_smile:

Thanks to @anon6471198