Same problem, when i install ubuntu lucid with "KMS"=ON the 3D effect with compiz are very slow, the solution for me was to desactived KMS with this command:
sudo su
echo options radeon modeset=0 > /etc/modprobe.d/radeon-kms.conf
Now compiz is working fine, but i hope they gonna solve this bug! :)
Same problem, when i install ubuntu lucid with "KMS"=ON the 3D effect with compiz are very slow, the solution for me was to desactived KMS with this command:
sudo su d/radeon- kms.conf
echo options radeon modeset=0 > /etc/modprobe.
Now compiz is working fine, but i hope they gonna solve this bug! :)
my graphic card -> ati x1650pro agp
my motherboard -> asus A7N8X-Deluxe rev. 2.0