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I am using Ubuntu 12.04 x86_64 with a Cinnamon desktop.

Today, out of the sudden, I was kicked from desktop to login screen. I entered my password and noticed that my window decorations disappeared. I ran:

sudo aptitude reinstall cinnamon

After that I wasn't even able to login (black screen and back to login screen). After research I managed to resolve the login issue by removing my ~/.Xauthority file.

Althought I can log to default Ubuntu (Unity) session, I can't do this with all other window managers - Cinnamon and Gnome. Furthermore, any login attempt to mentioned sessions re-initiate the login issue for all sessions.

Any help would be appreciated.

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can you reinstall graphic card driver+gnome again? – Hojat Taheri Aug 16 '12 at 14:45
by gnome you mean what package exactly? – Robin92 Aug 16 '12 at 14:48
Use the Gnome session to login (so, things should break), now switch to tty1 (Ctrl+Alt+F1) and then run gnome-shell --replace then switch back to tty7 (Ctrl+Alt+F7), let me know about the outcome. – SeMeKh Aug 16 '12 at 14:56
$sudo aptitude install gnome-desktop-environment – Hojat Taheri Aug 16 '12 at 15:00
@SeMeKh sudo gnome-shell --replace does nothing, gnome-shell --replace produces Segmentation fault (core dumped) – Robin92 Aug 16 '12 at 15:02
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