[Nouveau] "enable dri3 support without glamor" causes gnome-shell regression on nv4x

[poma]

On 03.08.2015 15:02, Hans de Goede wrote:
> Hi,
> 
> On 30-07-15 16:09, Ilia Mirkin wrote:
>> FWIW this is a fail on nv50+ as well. See for example
>> https://bugs.freedesktop.org/show_bug.cgi?id=91445
>>
>> My suspicion is that this is due to the lack of PUSH_KICK in the *Done
>> exa handlers -- works fine with DRI2, but DRI3 has no synchronization
>> and so the commands never get flushed out. Easily verified by sticking
>> PUSH_KICK's everywhere.
> 
> I do not believe that that is the problem, in my case it clearly
> seems to be a pitch / swizzle problem rather then a synchronizarion
> problem, here is what my desktop with gnome shell looks like when
> using DRI2:
> 
> https://fedorapeople.org/~jwrdegoede/nv46-gnome-shell-good.jpg
> 
> And this is what it looks like when using DRI3:
> 
> https://fedorapeople.org/~jwrdegoede/nv46-gnome-shell-bad.jpg
> 

You can tell, just by looking at garbled pattern, what is the actually problem!?