Bug#682099: xserver-xorg-video-ati: EXAPixmaps=On screen tearing at high resolution under certain configurations

Alex Deucher alexdeucher at gmail.com
Wed Oct 24 06:42:18 PDT 2012

On Wed, Oct 24, 2012 at 5:41 AM, James Robertson <j at mesrobertson.com> wrote:
>> The only other option I was going to try was using a Display port to
>> DVI adapter from the side of my laptop to replace the VGA from the
>> docking station.  If I purchase one to  try that I'll let you know.
> I bought a an Active display port adapter for my laptop.  That won't
> even work with resolutions above 1280x1024 under Debian (works fine up
> to native 1980x1080 res on Windows 7).
> I wanted to use one of my monitors in portrait mode but the the
> rotation would not work if I had Option "NoAccel" "true".  Of course
> disabling it meant I get the hideous screen corruption.
> All of this works fine on Windows 7 with DVI/VGA or Display Port so at
> least I can confirm it's not a hardware limitation.
> I am quite bummed to have this problem.  Can anyone suggest ways in
> which I can troubleshoot/resolve it?

Can you try a newer kernel?  3.6 or 3.7?  That may help with the
modesettings.  As for the acceleration, corruption, you might try a
newer version of mesa.


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