i965 support broken

[Maxim Levitsky]

Added CC.
> Hi,
> 
> I have just updated graphics stack on my i965 based system.
> 
> Now, I notice that in many 3d applications, (I test few games) screen
> flashes and I see for a moment few garbage triangles.
> 
> ppracer flashes its main screen in above way, suspetuxkart shows that
> issue, after few minutes of playing, etc...
> 
> 
> a quick bisect revealed unfortunately that last *good* commit is
> 
> 20d9204fbd71aebf870834b612579419d2c278b5 radeon: fix max indx/vertex emission due to state checker
> 
> 
> After that, 3d output went completely black, and I didn't yet traced it
> back when it started working again, the way it does in head.
> 
> commit d6b8664e3cd37c081cb1dd3d6cd5ffdac1813dac swrast: minor code consolidation
> 
> still shows black output
> 
> 
> master commit on my system is c4a3e036ed1c755a291018251c4f55c45ac17079
> 
> 
> could you also look at 
> https://bugs.freedesktop.org/show_bug.cgi?id=23254
> 
> 
> pretty much even now, if I revert commit 
> 
> 0f328c90dbc893e15005f2ab441d309c1c176245 i965: Fall back or appropriately adjust offsets of drawing to tiled regions.
> 
> Then and only then, suspend&resume works just fine with compiz running,
> otherwise, compiz is broken on resume
> 
> 
> Best regards,
> 	Maxim Levitsky
> 
> 
>