Ubuntu
nvidia-graphics-drivers-352 package

  1. Bug #1518473
  2. Comment #5

Comment 5 for bug 1518473

Revision history for this message
dhenry (tfc-duke) wrote :

Same issue with GTX 980M on Ubuntu 16.04, even with latest NVIDIA drivers (367.27).

I described this on NVIDIA forums:
https://devtalk.nvidia.com/default/topic/942337/linux/backlight-brightness-not-hooked-to-acpi-events-ubuntu-16-04-/

I manually fixed it by created an acpid event handler, however in my solution, it only works when changing the brightness with the Fn-keys, but not by changing /sys/class/backlight/acpi_video0/brightness value.

Link Dupont's fix works better (but I didn't use video.use_native_backlight=1 on GRUB_CMDLINE_LINUX as he said). By the way, the link to his solution is dead. This one works: http://sub-pop.net/post/fedora-23-on-system76-oryx-pro/