Can you also attach an: lspci -nv
and: /var/log/Xorg.0.log from the session with the corruption. ** Summary changed: - OpenGL screensaver are shown only at the upper half of the screen + OpenGL viewport cut-off with 915gm graphics -- OpenGL viewport cut-off with 915gm graphics https://launchpad.net/bugs/43052 -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
