https://bugs.freedesktop.org/show_bug.cgi?id=37781
Summary: Major redraw/flicker issues on rv350 after exiting fullscreen app with compiz running Product: Mesa Version: git Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r300 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: oreaus@gmail.com
With default packages in ubuntu natty 11.04, there is a problem where running and exiting a fullscreen application with compiz running causes major redraw/refresh flickering issues. They go away after restarting compiz, but start again reliably after exiting any fullscreen GL app. Here are the bisect results:
2a95568f64a6641a49a2d4855272e9be2ac2db6d is the first bad commit commit 2a95568f64a6641a49a2d4855272e9be2ac2db6d Author: Kenneth Graunke kenneth@whitecape.org Date: Wed May 11 07:54:57 2011 -0700
i965: Avoid register coalescing away MATH workarounds on Ivybridge.
The MATH instruction cannot handle source modifiers, even on Gen7. So, apply this workaround for Sandybridge on Ivybridge as well.
Signed-off-by: Kenneth Graunke kenneth@whitecape.org Reviewed-by: Eric Anholt eric@anholt.net
:040000 040000 9cb73cbd09661d6ca745d42fa4aac07963d439b2 2b1804644fe873d2b054645c8e8d5a435d3cbe75 M src
As a side note, the problem is actually worse in mesa current master, where it does not require triggering, but instead is flickering right after X/compiz start the first time. I plan to bisect between the problem commit here and master next to find out what causes it to get worse.