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Switch to a different virtual terminal (ctrl-alt-F3), login and restart desktop manager, switch back to the normal GUI terminal (ctrl-alt-F2)
You can try the Magic SysRq key, if its enabled.
Switch to a different virtual terminal (ctrl-alt-F3), login and restart desktop manager, switch back to the normal GUI terminal (ctrl-alt-F2)
You can try the Magic SysRq key, if its enabled.