Matt555
iMod
When I tried to configure XGL+Compiz in Kubuntu I had exactly the same problem as you. A mass slowdown with no 3D accelaration.
As for your package breakage. Go to a terminal and type:
Code:sudo apt-get -f install
This is what I get:
Code:
Reading package lists... Done
Building dependency tree... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
compiz-core has installed okay, it's just the other options all give me that BREAK message instead of 'install'