Ubuntu
hal package

  1. Bug #207473
  2. Comment #87

Comment 87 for bug 207473

Revision history for this message
Kostas Chatzikokolakis (kostas-chatzi) wrote : Re: Screen brightness double level changes

On my xps 1330, the two workarounds behave as follows:

- putting "blacklist video" in /etc/modprobe.d/blacklist

The brightness keys work fine, the only issue is that the brightness indicator does not appear when you press the buttons.

NOTE: this workaround was causing a serious problem, disabling keyboard events after changing the brightness (bug #261721). However, this bug was fixed by the 2.6.27-8 kernel (available in proposed), so with this kernel the workaround can be used again.

- deleting /etc/acpi/video_brightness<up/down>.sh

This also works, including the brightness indicator. However, as reported by Sandro Mani above, the brighness jumps to 100% and then quickly back to the desired level, which is annoying and potentially harmful for the screen.

So I personally prefer the first workaround for now (hoping for a fix soon)