[Bug 29972] d-r-t /r6xx+: use new style fencing (v2) causes very poor gl perf.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29972

--- Comment #2 from Alexandre Derumier <aderumier at odiso.com> 2010-09-03 07:56:44 PDT ---
i think the problem come from the writeback patch:

other archlinux users have the same problem

https://bbs.archlinux.org/viewtopic.php?pid=820584#p820584


with radeon.no_wb=1  in boot parameter, i don't have any slowdown.

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