The brightness control in Ubuntu 18.04 does not have any effect on the screen brightness on my Asus TUF A15. I have tried everything suggested here: Brightness problem Ubuntu
I have added to /usr/share/X11/xorg.conf.d/10-nvidia.conf as this:
Section "OutputClass" Identifier "nvidia" MatchDriver "nvidia-drm" Driver "nvidia" Option "AllowEmptyInitialConfiguration" ModulePath "/usr/lib/x86_64-linux-gnu/nvidia/xorg" Option "Backlight" "acpi_video0" EndSection
And changed the relevant line in /etc/default/grub to read:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"
I've run apt update-grub and rebooted. I've tried nvidia-drivers-330 and 340. All to no effect.
Anything else I can try? Is my 10-nvidia.conf file correct?