If even Ctrl-Alt-Del doesn’t work, use the SAK. Hold down Alt-PrintScreen (this is the SysRq key combo), and while holding down those keys, press the letters ‘S’ to sync the disks, then ‘U’ to unmount the filesystems and ‘B’ to reboot the computer. Always try that before going for the power button. It’s a bit awkward to do all that while holding Alt-PrintScreen, but it’s not something you’ll do often.
Paralipsis » Blog Archive » Enabling Xinerama in Ubuntu
Oh man, I love Linux and all that, but setting up screens continues to be needlessly byzantine. I mean, that guy’s being hilariously specific, but I can almost understand people bitching about desktop Linux in Slashdot threads.
