This problem still exists for me. I have a Samsung X20 with a mobile
915G integrated graphics controller.

Until about last week, compiz-fusion worked fine using the normal
xserver-xorg. After some updates (the "normal" ones coming out of the
standard repositories!), compiz-fusion stopped working and complains in
the following way:

[EMAIL PROTECTED]:~$ compiz --replace
Checking for Xgl: not present.
Detected PCI ID for VGA: 00:02.0 0300: 8086:2592 (rev 03) (prog-if 00 [VGA])
Checking for texture_from_pixmap: present.
Checking for non power of two support: present.
Checking for Composite extension: present.
Comparing resolution (1400x1050) to maximum 3D texture size (2048): Passed.
Checking for nVidia: not present.
Checking for FBConfig: present.
Checking for Xgl: not present.
Starting kde-window-decorator
/usr/bin/compiz.real (core) - Fatal: No GLXFBConfig for default depth, this 
isn't going to work.
/usr/bin/compiz.real (core) - Error: Failed to manage screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :0

If I install XGL, compiz will work, but it is unbearingly slow - and it
wasn't that slow until last week. Plus, I have noticed that my GFX card
has no direct rendering any more:

[EMAIL PROTECTED]:~$ glxinfo | grep direct
direct rendering: No (If you want to find out why, try setting 
LIBGL_DEBUG=verbose)
OpenGL renderer string: Mesa GLX Indirect

I would appreciate if someone could sort this out. If you need any
additional information, please do not hesitate to ask.

-- 
glxinfo: 'Direct rendering: no' on 915GM video chipset on Gutsy
https://bugs.launchpad.net/bugs/154104
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