https://bugs.freedesktop.org/show_bug.cgi?id=35095
--- Comment #11 from Chris Rankin rankincj@googlemail.com 2011-06-23 00:55:35 PDT --- I've just retested WoW with HiZ enabled on my M66GL and the 2.6.39.1 kernel, and my dmesg log now fills up with these messages:
[drm:r100_cs_track_check] *ERROR* [drm] No buffer for z buffer ! [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
RADEON_DEBUG=nohiz "fixes" it still.