Bug#529178: xserver-xorg-video-ati: Suffering from this bug + Possible mitigation

Alex Deucher alexdeucher at gmail.com
Wed Apr 3 06:34:40 PDT 2013

On Tue, Apr 2, 2013 at 10:04 AM, Pablo Oliveira <pablo at sifflez.org> wrote:
> Package: xserver-xorg-video-ati
> Version: 1:6.14.4-8
> Followup-For: Bug #529178
> Dear Maintainer,
> After updating my system to wheezy, and in particular the
> xserver-xorg-video-ati package to version 1:6.14.4-8, I
> now suffer from a similar issue.
> I have two monitors. The right one, and only the right one, randomly
> turns off and on.
> * I use the default Xorg configuration and setup dual monitors
>   using xrandr --output DVI-0 --left-of DVI-1 --auto.
> * The two monitors are identical models: SAMSUNG SyncMasterB1940.
>   The problem does not seem to be in the monitors: when I swap the two DVI
>   connectors, the left one starts to flicker on and off and the right
>   one works flawlessly.
> * If I run "xset dpms force off" the problems disappears completely.

To clarify, do you mean that after a dpms cycle both monitors work
correctly?  Does a newer kernel help?  3.2 is pretty old.  There were
a number of display related fixes that went into 3.7 for example.


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