Bug#560158: gnome-screensaver: turns of backlight and makes it impossible to turn it on again

[Norbert Preining]

On Wed, 09 Dec 2009, Josselin Mouette wrote:
> I don’t think gnome-screensaver has anything to do with that problem. It
> doesn’t act upon lid close, it doesn’t set the backlight.

Why then does killing gnome-screensaver makes it work, 100% of the time?

> The odds are 50-40-10 for me between a kernel bug, a X driver bug, and a
> gnome-power-manager/devicekit-power bug.

Gnome-power-manager I guess we can rule out, I have made tests with
g-p-m killed, so not running (and checked that it was not restarted).

Both X driver bug and kernel bug sounds strange, because in twm/and lxsession
it is working without any problem.

So I conjectured composite extension and disabled the composite box in 
for metacity so that it does not use that one, but it didn't help,
still 100% reproducible.

> Please try with a 2.6.31 kernel to see if this is a regression in the

Ok, 2.6.31 I can try.

> kernel. Please also try with KMS enabled, or disabled if it’s already

Is there a way to disable KMS if it is compiled into the kernel?

Best wishes

Norbert

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Norbert Preining                preining@{jaist.ac.jp, logic.at, debian.org}
JAIST, Japan               TU Wien, Austria            Debian TeX Task Force
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