I think this is the bug introduced by:
commit 812d046915f48236657f02c06d7dc47140e9ceda
Author: Alex Deucher <alexdeucher@gmail.com>
Date: Mon Jul 26 18:51:53 2010 -0400
drm/radeon/kms/r7xx: add workaround for hw issue with HDP flush
(cherry-picked in 2.6.32-20, via 2.6.34.3) and fixed by:
commit 87cbf8f2c5d1b1fc4642c3dc0bb6efc587479603
Author: Alex Deucher <alexdeucher@gmail.com>
Date: Fri Aug 27 13:59:54 2010 -0400
drm/radeon/kms: fix a regression on r7xx AGP due to the HDP flush fix
Just need to check whether the device in question really is an AGP
device.
Ben.
--
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.
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