Hello there. I have the same problem, when trying to enable Desktop Effects, I get the error message "Desktop effects could not be enabled".
I'm using Ubuntu 8.10 (and my system is 'up to date'), should I downgrade to 8.04?
Also, I'm using the Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller driver (which doesn't appear to be propietary because if I open System >> Administration >> Hardware Drivers, the list appears to be empty).
I've already commented some lines in the /usr/bin/compiz file in which my video card driver was blacklisted.
What else can I do to make it work?
This is the output the "compiz" command spews out in a terminal:
Code:Checking for Xgl: not present. Detected PCI ID for VGA: Checking for texture_from_pixmap: not present. Trying again with indirect rendering: Checking for texture_from_pixmap: present. Checking for non power of two support: present. Checking for Composite extension: present. Comparing resolution (1280x960) to maximum 3D texture size (2048): Passed. Checking for Software Rasterizer: present. Software rasterizer detected, aborting aborting and using fallback: /usr/bin/metacity