Red Hat Bugzilla – Bug 1268091
Gnome backlight control prefers nv-backlight over intel-backlight on optimus systems
Last modified: 2016-07-19 14:14:17 EDT
Description of problem
When changing the brightness level on gnome-shell it has no effect on the screen backlight.
Gnome by default adjusts the value of "/sys/class/backlight/nv_backlight/brightness" when it should adjust the value of "/sys/class/backlight/intel_backlight/brightness" as the intel card handles the output.
The default behaviour is understandable for desktops but it doesn't work for laptops.
* The system is an optimus laptop, it consists of 2 graphic cards where the intel one handles all the output.
* Only open source drivers, i915 and nouveau, are used.
* PRIME is used to switch cards, not bumblebee.
* While changing the brightness on gnome's slider or using the hotkeys the file "/sys/class/backlight/nv_backlight/brightness" changes too.
* xbacklight works fine, it changes intel_backlight only.
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
Thank you for reporting this bug and we are sorry it could not be fixed.
It's still broken in Fedora 24.