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On 2012-01-25T09:09:54+00:00 Martin Pool wrote:

Forwarded from

"[arrandale] desktop is messed up with external monitors (x86_64)" 
[Critical,Triaged] https://launchpad.net/bugs/745112
(which has various hardware info, etc)

On a Thinkpad X201, external monitors can reliably set low-resolution
modes (eg 1280x800), but at higher resolutions they apparently do not
set the right sync lines and the monitor goes black.

In some cases, it works correctly if you first set a low resolution and
then gradually step up, but this does not work reliably.

I can reproduce this in the current build from http://kernel.ubuntu.com
/~kernel-ppa/mainline/drm-intel-next/2012-01-05-precise/

Linux joy 3.2.0-997-generic #201201050433 SMP Thu Jan 5 09:34:48 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux

Reply at: https://bugs.launchpad.net/xserver-xorg-video-
intel/+bug/745112/comments/118

------------------------------------------------------------------------
On 2012-01-25T09:13:33+00:00 Martin Pool wrote:

I'm very happy to test or debug things here, if someone gives me a
pointer where to start.

Reply at: https://bugs.launchpad.net/xserver-xorg-video-
intel/+bug/745112/comments/120


** Changed in: xserver-xorg-video-intel
       Status: Unknown => Confirmed

** Changed in: xserver-xorg-video-intel
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/745112

Title:
  [arrandale] desktop is messed up with external monitors (x86_64)

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