[Bug 18397] Occasional mouse cursor corruption [EXA enabled]

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18397





--- Comment #28 from Øyvind Stegard <oyvinst at ifi.uio.no>  2008-12-22 08:36:49 PST ---
(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


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