[Bug 31046] New: [r600g, tiling] visual errors and GPU resets

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Oct 22 03:29:30 PDT 2010


           Summary: [r600g, tiling] visual errors and GPU resets
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: liquid.acid at gmx.net


Yesterday I saw with much delight that the was some new tiling code in r600g,
which could be enabled with a simple envvar. So I pulled drm-radeon-testing and
applied Dave's patch for the CS checker to it (this one:

However I encountered several problems with the new code (exporting
R600_FORCE_TILING=1 makes a difference, so it is working to some extent:

1) ioquake3 shows lots of gfx errors. Mipmaps are affected the most (when
setting r_textureMode to GL_LINEAR these problems disappear), but also small
textures seem to be affected (staircases, which use small textures, are either
rendered totally black or black with white stripes).

2) doom3 (demo) shows similar mipmap-related errors.

3) ut2004 is completly unplayable, I get GPU resets nearly every frame and most
of the geometry is missing.

4) ut2003 kinda works, but the HUD is messed up and sprite rendering is totally

Going to post some snips from the kernel log later.

My hardware:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 4770 [RV740]

libdrm, mesa and xf86-video-ati are all git master tip.
ColorTiling is enabled in the xorg.conf, verified this by checking the Xorg


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