i got the problem on thinkpad r50e, too. the problem was noticed while running google earth. it is now fixed by using the respositries of http://xgl.compiz.info/
thx for the hint @ Edu -- OpenGL viewport cut-off with 915gm graphics https://launchpad.net/bugs/43052 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
