After having installed the proprietary Nvidia driver on Debian Jessie in order to play Steam games (which I now can), I can't change the brightness at all, it is stuck at the maximum and is irritating my eyes at night. I have already tried all of the solutions in the Debian wiki
such as adding the line: Option "RegistryDwords" "EnableBrightnessControl=1;"
to /etc/X11/xorg.conf
and /etc/X11/xorg.conf.d/20-nvidia.conf
but that has not worked, even though in the Debian forums it seems to work (marked solved):
xbacklight does not work at all, and I don't know what to do anymore. I will post any outputs for whatever terminal commands, please help.
xrandr --output LVDS1 --brightness 0.4
(put your display instead of lvds1 if needed)?xrandr --output LVDS-0 --brightness 0.2
works! It doesn't seem to change the brightness at the hardware level, but it will save my eyes! Thanks to user jimmij!echo 2 > /sys/class/backlight/acpi_video0/brightness
doesn't work? (again changeacpi_video0
to your device like intel_backlight etc.).sudo echo 2 > /sys/class/backlight/asus-nb-wmi/brightness
I get:bash: /sys/class/backlight/asus-nb-wmi/brightness: Permission denied
sudo -s
then the eco. Sudo doesn't work over piped echos in the way described. You need to doecho "moo" | sudo tee /patch/to/file.txt