Comment 37 for bug 291053

(In reply to comment #27)
> (In reply to comment #26)
> > (In reply to comment #22)
> > > Hi, tried the latest patch (id=21387), and here's what I've observed so far:
> > >
> > > + I cannot reproduce mouse cursor corruption problem (cursor changes also take
> > > longer before they are visible, like a 2 second lag)
> > > + Solves this bug as well: https://bugs.freedesktop.org/show_bug.cgi?id=18398
> > >
> > > - Compiz is noticably slower, and animations tend to be more jerky (for
> > > instance when switching desktop)
> > >
> > > All testing so far done with only "AccelMethod" "EXA" in xorg.conf.
> >
> > Can you try reducing the w/h cut-offs (currently 32) in the patch to see at
> > what limit you get corruption?
> >
>
> I'm on it ..
>

Some data points:
* w/h > 16 => GTK checkbox corruption occurs in Firefox (very easy to reproduce, so I use it as test case)

* w/h > 24 => No GTK checkbox corruption in Firefox (so no corruption).

Another observation:
Emacs 22 scrolling gets very slow (to the point of total "acquarium-effect" when scrolling up or down), when the patch is enabled, even for w/h cutoff as small as 16. Scrolling is back to normal/fast without the patch. Just noticed it when editing src/radeon_exa_funcs.c .. So I guess disabling DFS for smaller pixmaps certainly has drawbacks.

Øyvind