My notebook’s brightness level was always set to maximum notwithstanding my previous adjustments using the brightness slider in the Gnome system menu.
This is a problem experienced by many people on various distributions. Therefore search engine results are helpful to find a solution. Arch Wiki was again the most informative guide that I read during my search. I’ll note here how I solved this issue for future reference.
I confirmed by changing the value written in it that the actual brightness value on my debian 8.3 (debian jessie) system is stored in this file:
/sys/class/backlight/intel_backlight/brightness
This path may be different if your graphics card is different. It would be prudent to check that directory first and use the correct path below accordingly.
If I add the following line to the /etc/rc.local file (before the last line which is “exit 0”) it runs during boot process and set brightness level to the value specified:
echo 75 > /sys/class/backlight/intel_backlight/brightness
Here the value “75” may be increased or decreased according to your preference.
From defending clients to defending code. Developing software professionally in the U.S., offering legal advice on the side, and gaming like it’s still the ’90s. LLM Exeter, PhD(c) in Private Int’l Law. Defender of Kaer Morhen.