Ubuntu
nvidia-graphics-drivers package

  1. Bug #562005
  2. Comment #14

Comment 14 for bug 562005

Revision history for this message
Delyan Kalchev (delyank) wrote :

Hello. I've just tested the option you had mentioned. It successfully forces the driver to control the brightness. But the only way to change it is using the slider in the Power Management windows (in System->Preferences). Using the function keys does not change the brightness. Only the notification appears (so the key pressing is surely detected) but nothing changes - neither in the progress bar in the notification, nor the brightness itself. The Brightness applet in the panel refuses any change, either. It is completely the same when I remove the proprietary driver, the only difference is that without the proprietary driver the resolution is wrong and cannot be set to normal. I cannot imagine why the applet is not working. I can also use (when root) a command like

 echo 80 > /proc/acpi/video/DGFX/LCD/brightness

and it sets the brightness

When using the slide to set the brightness I can NOT detect any buzz or humming. Probably it is specific effect on ThinkPad's hardware or because I do not use keys to set the brightness degree, so no hardware-confusing values appear. Either way a fix is needed.

I'm attaching my logs for comparison. Those with "_no" in the name are without the proprietary driver, and the ones with "_yes" are with it.