[Intel-gfx] glXSwapBuffers tearing and dropped frames

Łukasz Kuryło lukasz.kurylo at gmail.com
Thu Jun 25 14:35:56 CEST 2009

Dnia czwartek 25 czerwca 2009 o 12:56:07 Barry Scott napisał(a):
> The attached swap-buffer-composite-test.c demonstrate that
> glXSwapBuffers tears the first line of the screen.
> I have tested at 1920x1200 at 60Hz and 1024x768 at 60Hz.
> kernel 2.6.30
> xserver 1.6.1
> xf86-video-intel from git 
> b5cd2130f97591f4a387db1b98c940c30bc6404c with
> our patches posted to this list
> for portrait mode and 2048x2048 XV.
> Mesa from git, branch origin/mesa_7_5_branch, commit
> 8f382fd3f396e182255fe084bc32648b98ca1d94
> I assume that this is because the GPU has not been 
> programmed correctly.
> Do you want this logged in bugzilla?
> Barry
I've run this test on my dualhead configuration (1680x1050 + 1920x1200).
on first monitor tearing on whole monitor surface, this is expected as it has smaller area than second monitor so swap is synced to second one
on second monitor tearing of first line but only on first part of screen possibly up to 1200 on x coordinate (x,y swapped?)
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