Ubuntu
xserver-xorg-video-intel package

  1. Bug #381461
  2. Comment #12

Comment 12 for bug 381461

Revision history for this message
Christian Stöveken (excogitation) wrote :

I just realized that when trying to set display brightness in "Power Management Preferences" to some levels also triggers the
fluxuating.

In my case e.g. 87% causes brightness to constantly switch betwen 80 and 90%.

:/proc/acpi/video/IGD/LCD$ cat brightness
levels: 20 30 40 50 60 70 80 90 100
current: 80 (-> 70 -> 80 ...)

Also when already at 100% and hitting the raise brightness key again does sometimes start the fluxuating or just throws it back to the next lower level.

No backlight output in xrandr --verbose though.