Created attachment 39096 [details] Note that black stripe on the right side of the monitor. I have Notebook with LVDS1:1680x1050 display and external monitor VGA1:1920x1200. After enabling compiz in kwin everything on that extended VGA1 display (arranged on the right of LVDS1) gets shifted to the left by 128 pixels (left most part is missing), mouse cursor is OK. I believe that this issue is caused by the lack on copy-fb patch in the latest packaged versions of the driver. xserver-xorg-video-intel (2:2.12.0-1ubuntu5) is OK xserver-xorg-video-intel (2:2.12.902+git20100930.345c963e-0ubuntu0sarvatt) is BAD I did git bisect between latest git and 2.12.0 (vanilla) and it was always BAD. My conclusion is that one of the patches in 2:2.12.0-1ubuntu5 was fixing this.
commit 52e68630d13f9668f8f4dd6978fa41039bacfaf6 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Sun Aug 8 10:15:59 2010 +0100 drm/i915: Fix offset page-flips on i965+ i965 uses the Display Registers to compute the offset from the display base so the new base does not need adjusting when flipping. The older chipsets use a fence to access the display and so do perceive the surface as linear and have a single base register which is reprogrammed using the flip. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Reported-by: Marty Jack <martyj19@comcast.net> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> *** This bug has been marked as a duplicate of bug 30295 ***
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