Benjamin Herrenschmidt [2006-02-10 18:12]: > Here's a 3rd set of patches. Please report regressions ASAP as I intend > to merge those in the various CVS trees real soon now. > > [...] > > Also, I fixed a potential issue in the DRM with machines where AGP > writeback doesn't work (we would still rely on AGP writeback for the > ring read ptr instead of reading it from a register).
I believe these 2 patches introduce a hardware lockup problem in 3D
mode for me. It's not reliably reproduced though, so I'm not sure
whether this is a regression wrt to patch set #2 or a another problem.
However, I never had that problem with the second patch set.
The symptom is that my LCD turns off ("no signal") and the machine locks
up. I don't know enough about the DRM code to say whether it's even
possible that the diff between drm-3.diff and drm-4.diff could introduce
such problems.
The AGP writeback stuff seems to work just fine on my machine. dmesg
says: [drm] writeback test succeeded, tmp=1.
The graphics card is a ATI Technologies Inc R420 JI [Radeon X800PRO] /
X800 GTO.
Regards,
Tilman
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