massive qt-demo graphical corruption on F12 + Intel + KMS

[Kevin Kofler]

Rex Dieter wrote:
> Funny you say that.  For my and my i945-based box, F-10 was the horrible
> regression (desktop effects became essentially unusable)... and about
> 1/2 way through F-11 dev-cycle it magically started working well again.
>   Go figure.

For my GM965, F9 was awful (3D was either slow or triggered assertion 
failures depending on the app/game, e.g. ppracer triggered the assert), F10 
is working great except for the occasional lockup, I have yet to try F11 or 
F12.

        Kevin Kofler