Ubuntu
linux package

  1. Bug #1440270
  2. Comment #4

Comment 4 for bug 1440270

Revision history for this message
Marco Cè (marco89-7) wrote :

I have the same issue on a Dell XPS 13 (L322X, Ivy Bridge model with 1080p display).
- With 3.19.0-11-generic backlight is working fine.
- With 3.19.0-12-generic, keyboard buttons produce notifications but the brightness is not changed. I can manually change it writing to '/sys/class/backlight/intel_backlight/brightness'.
- I tested 4.0.0-040000rc7-generic from kernel-ppa/mainline and it is working fine, as 3.19.0-11-generic.
With all kernels, when brightness is set to 0 the display (not only backlight) turn off, but I think it's another bug.

I'm available if more tests are needed to bisect the issue.