Control fb problem on 8500

[Michael Schmitz]

> > > I don't think having to use ShadowFB with the fbdev driver is too bad
> > > because it should generally enhance performance :)
> >
> > I guess control is the exception. I found out it isn't worth the memory
> > impact. I once ran a complete x11perf run comparing with and without
> > shadowfb, and with shadowfb was overall slower. Some operations were
> > faster, though, but not in general.
>
> Oh no. This is very bad.

But that was on 4.0, not 4.0.1, right? shadowfb on 4.0 fbdev treated me to
a ~5sec delay on logout while that nice grey pattern was drawn line by
line. Someone said it was due to a bug in shadowfb... and I'd assume it
was fixed in 4.0.1.

	Michael


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