Window mapping w/EXA really slow in Xorg 7.2

Joel Feiner jafeiner at
Fri Apr 20 05:32:17 PDT 2007

Jeeze, I need to learn how to use gmail, folks.  Sorry for sending emails
directly to people on this list instead of to the list itself.

Alright, I built the entire system from git (which was somewhat
painful, but not altogether terrible) and the problem seems to have gone
away.  I'm not sure why I was getting the regressions with the Gentoo
provided X-servers.  I should note that I was able to the build the X server
from git before but I still had these problems.  It's only now that I've
built the very latest version along with all the other junk that the problem
has gone away.
> On 4/19/07, James Cloos <cloos+pdx-xorg at> wrote:
> >
> > >>>>> "Joel" == Joel Feiner <jafeiner at> writes:
> >
> > Joel> I have an ATi x300 (r300 driver).  I have been using EXA plus the
> > Joel> composite extension in conjunction with xcompmgr/kompmgr, that is,
> >
> > Joel> 2d compositing.  With X server 7.1.1, everything works great.  ...
> > Joel> But with X server 7.2, ...  switching virtual desktops and mapping
> > Joel> large windows is slow.  Switching desktops is especially slow
> > Joel> taking as long as 2 seconds to complete.  Most of that time, there
> > Joel> is no change in the screen.  It is only at the very end that all
> > Joel> the windows appear for the new desktop.
> >
> > This happens for me (on Radeon M7, r100 driver) as well, even w/o the
> > composite module loaded.  I use icewm.
> >
> > Switching to a desktop with a seamonkey or firefox window is especially
> > slow.  Desktops with emacs or urxvt windows are more tolerable, but not
> > nearly as fast as things used to be.  (One significant difference
> > between the likes of emacs or urxvt vs zilla is xft vs cairo.)
> >
> > My xserver, ati driver, xcb, libx11, cairo, mesa are all git master,
> > I use EXA, and cairo may or may not be using glitz.  (I can't tell;
> > glitz is linked in, but I can't be sure whether the glitz, xcb or libx11
> > backends are in use....)
> >
> > This has been the case for a while.
> >
> > -JimC
> > --
> > James Cloos < cloos at>         OpenPGP: 1024D/ED7DAEA6
> >
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