That's odd---I don't have that XAANoOffscreenPixmaps line in my
xorg.conf, even after I enabled desktop effects. The effects still work
(ie., wobbly windows), but the desktop is so glitchy that it's unusable.
Here's the relevant portion:
Section "Device"
Identifier "ATI Technologies Inc Radeon R100 QD [Radeon 7200]"
Driver "ati"
BusID "PCI:1:0:0"
EndSection
I just added the [ Option "XAANoOffscreenPixmaps" "true" ] under the BusID, and
now 3d seems much faster, and the effects are faster too. I wonder why that
option isn't added for the r100 automatically?
I also tried Beryl, but their window manager doesn't work on this card
and reverts back to metacity. Compiz however does now work with all
that 3d goodness--except that the desktop goes white, and the bottom
gnome -panel with my window list doesn't respond or update.. I tried
killing nautilus, because it draws the desktop, but it was still white,
even after it came back up.
I attached a screen shot of what I mean. You can tell that compiz is
working (shadows, alt + tab, all that) but the desktop is white and
glitchy and gnome-panel at the bottom isn't working.
** Attachment added: "screenshot of compiz glitchiness on a r100"
http://librarian.launchpad.net/7135170/Screenshot.png
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Title bar not drawn on maximized windows when desktop effects are enabled
https://bugs.launchpad.net/bugs/89741
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