[Bug 50655] ATI RV670 [Radeon HD 3870] Ioquake games causes GPU lockup (waiting for 0x00003039 last fence id 0x00003030)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50655

--- Comment #41 from Alex Deucher <agd5f at yahoo.com> ---
Created attachment 75274
  --> https://bugs.freedesktop.org/attachment.cgi?id=75274&action=edit
flush fix 1/4

Please try this patch series.  The 4th patch is optional.  It just enables CP
DMA assuming that the previous flushing fixes fix the CP DMA issues.

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