Ubuntu
gnome-power-manager package

  1. Bug #762670
  2. Comment #10

Comment 10 for bug 762670

Revision history for this message
Gary Herron (gherron-digipen) wrote :

I too can confirm this. I've the same machine (XPS l702x aka XPS 17), display (hd 3D), and graphics card (GT 555m). Same results on each of the above suggested tests. All indications (OSD, /proc values, g-p-m output) are that the brightness is changing, but the actual screen does not change. (Haven't tried the reboot trick yet.)