EXA problems on R420

[agd5f]

Specifically:

https://bugs.freedesktop.org/show_bug.cgi?id=13258

This bug really worries me, because the program probably isn't that complex, yet the problem's effect is so obvious.

Of course, the problem might be in Mesa rather than the video driver. But then again, it might not.

That's a problem in the r300 3D mesa driver, not the radeon ddx.

[bridgman]

There are probably all kinds of rendering problems in the 3d driver. We only released the 3D documentation for 3xx-5xx family parts in the last month or two, so the bugfixing spree has just started and will probably speed up once EXA has made more progress and more devs switch their attention from EXA to 3D.