[Bug 23387] [R300] Screen artifacts on X [KMS]

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=23387





--- Comment #8 from Michel Dänzer <michel at daenzer.net>  2009-08-24 06:35:20 PST ---
(In reply to comment #7)
> EXANoDownloadFromScreen only helped when no OpenGL app was runnning at least
> for the time I tested. Once I started Auteria (http://www.auteria.com)game in
> the window, the font tearing and artifacts started appearing again.

A similar mechanism as for DownloadFromScreen is used for evicting buffer
objects from VRAM, so this indicates that VRAM -> AGP transfers are generally
unreliable on your system. One thing I notice in your dmesg is

[35162.662996] [drm] AGP mode requested: 4

Maybe you can try different values for the radeon.agpmode parameter, including
1, 2, not specifying any explicitly or -1 to disable AGP.

If none of that helps, maybe you can try booting the kernel or loading the
radeon kernel module with radeon.test=1 and see if that gives any interesting
results.

> Also the text inside the game is flickering.  

That could be a separate issue.


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