I've tried several things to fix this problem on my machine but the solution that work was easiest one. Just install fusion-icon and enable compiz from it: no more freeze and 3D effects work like charm
-- [i945] Intel 82945G/GZ Integrated Graphics Controller Freezes when compiz enabled https://bugs.launchpad.net/bugs/475429 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs