[drm:r600_ring_test] *ERROR* radeon: ring test failed (scratch(0x8504)=0xCAFEDEAD)

[Dan]

Hi all.

I've somehow broken 3D accel on my system. I'm not quite sure if it was
me, my distro, if there is a regression, or if my hardware has issues. I
did a fairly major system update ( Sabayon ) ... and rebuilt manually:

2.6.37 kernel with modesetting
mesa from git
libdrm from git
latest radeon firmware

Now I'm getting:

[   44.612719] [drm:r600_ring_test] *ERROR* radeon: ring test failed
(scratch(0x8504)=0xCAFEDEAD)
[   44.612724] radeon 0000:01:05.0: disabling GPU acceleration

 ... and obviously 3D accel is no longer working.

I've also tried with a 2.6.36 kernel with modesetting, which was working
previously ... it gives the same error now.

Any ideas?

Thanks for any help :)

Dan