Comment 15 for bug 135228

nainu, thank you for your comment. Disabling the "desktop effects" and disabling "AddARGBGLXVisuals" (not sure if both are necessary or just disabling desktop effects is enough) in my xorg.conf allowed me to log in normally to the "GNOME" session.

The xsession-errors file which I attached also lists an error message for Compiz. Have we verified that this is a bug caused by X.org/Compiz not playing nice with gnome-session and can I mark this bug as a duplicate of bug #125902? Or do you still want me to ask the question in the support tracker, Sebastien?