[Mesa-dev] [PATCH] i965: Do Sandybridge workaround flushes before each primitive.

[Emil Velikov]

On 23/01/15 22:25, Kenneth Graunke wrote:
> On Thursday, January 22, 2015 07:14:33 PM Emil Velikov wrote:
>> On 10/01/15 07:07, Kenneth Graunke wrote:
>>> Sandybridge requires the post-sync non-zero workaround in a ton of
>>> places, and if you ever miss one, the GPU usually hangs.
>>>
>> Would it be worth including this in the stable branch ?
>> Cc: <mesa-stable at lists.freedesktop.org>
>>
>> Thanks
>> Emil
> 
> Probably not right away, at least - this is really finnicky stuff, and while
> I'm hoping it could help users with hangs, it might have the opposite effect
> and cause lots of hangs :)
> 
> I was hoping to receive confirmation that it actually helped somebody first.
> 
I'm having a SandyBrigde machine here. If you have a rough idea how one
can replicate the gpu hangs I can give it a try.

I've only seen GPU two hangs, but that was in the dawn of 10.2 (early
10.3). Happened while running piglit yet the issue was intermittent.

Cheers
-Emil