[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 #46 from Andy Furniss <lists at andyfurniss.entadsl.com> ---
(In reply to comment #39)
> Created attachment 75272 [details] [review]
> Possible fix for R600 hw deadlock
> 
> Patch has been tested on a system with AMD K8 CPU and Radeon AGP card (AMD
> RV670 / Radeon HD 3850) with both 3.6.11-030611-generic kernel (from Ubuntu
> kernel PPA mainline) and kernel built from recent drm-fixes git in the
> testing. This patch may also be relevant to reported Bug 47116 .

Testing AGP HD3850 - this patch regresses etqw which since my previous post in
this bug had become stable. GPU lock within seconds with or without llvm.
Testing on 3.7.6 (purely because I have a separate issue with gpu locks
provoking oops with current kernels).

It does however seem to fix openarena and nexuiz which without this patch would
gpu lock, or really hard lock respectively after a couple of minutes. Haven't
had time to test really long runs yet though.

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