I am also experiencing this but I never use suspend. I have had this problem with both lock on and off in Brightness settings. I am also on intel.
I hope this helps others. I have found a way to restore my session to save any open programs or just to close session cleanly. Once the problem happens I go to a tty(Crtl+Alt+F1), log in and kill compiz and compiz-decorator. Then I run metacity, return to X(Crtl+Alt+F7) and start closing programs. I then opened a terminal (Crlt+Alt+T) and launch gnome-panel which gives me a menu to log out.
I do not know if metacity and gnome-panel ship stock or you have to install them. I never installed gnome 3 but it appears as a session option on my login screen.
I am also experiencing this but I never use suspend. I have had this problem with both lock on and off in Brightness settings. I am also on intel.
I hope this helps others. I have found a way to restore my session to save any open programs or just to close session cleanly. Once the problem happens I go to a tty(Crtl+Alt+F1), log in and kill compiz and compiz-decorator. Then I run metacity, return to X(Crtl+Alt+F7) and start closing programs. I then opened a terminal (Crlt+Alt+T) and launch gnome-panel which gives me a menu to log out.
I do not know if metacity and gnome-panel ship stock or you have to install them. I never installed gnome 3 but it appears as a session option on my login screen.