I had not noticed any problem with feisty 2.6.20-16 (ie. compiz worked).
Under gutsy 2.6.22-10 compiz doesn't work. I get similar messages in Xorg.0.log:
WW RADEON AGP not available
EE RADEON AGP failed to initialize. Disabling the DRI
II RADEON You may want to make sure the agpgart kernel module is loaded before the radeon kernel module.
So, I rmmod radeon and the modprobe radeon and then logged out and back in. compiz now works.
I had not noticed any problem with feisty 2.6.20-16 (ie. compiz worked).
Under gutsy 2.6.22-10 compiz doesn't work. I get similar messages in Xorg.0.log:
WW RADEON AGP not available
EE RADEON AGP failed to initialize. Disabling the DRI
II RADEON You may want to make sure the agpgart kernel module is loaded before the radeon kernel module.
So, I rmmod radeon and the modprobe radeon and then logged out and back in. compiz now works.
This is repeatable.
I have a compaq n620c
Can I supply anymore information to help?