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[ubuntu] 11.10 Lost All GUI Desktops

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linux-howto

http://ubuntuforums.org – I have an issue with a PC where all the desktops (Gnome Shell, Classic, Unity (2d,3d)) have all failed to start. The usual GUI login screen functions and shows all choices, but after login none of the desktops will start, and each returns to login screen. Before this appeared the machine was unable to run in Unity 3d, so Unity 2d was used mostly. I have tried to purge all shells and reinstall via command line to no avail. I'm assuming I have missed something. Any help? (Hardware)