Happens to me too on a Lenovo T510. Using KDE. Ctrl-alt-backspace doesn't restart X. Sometimes I can get into a tty (ctrl-alt-f1) where I can issue a reboot command but usually I have to force a hard shutdown with the power button.
Happens to me too on a Lenovo T510. Using KDE. Ctrl-alt-backspace doesn't restart X. Sometimes I can get into a tty (ctrl-alt-f1) where I can issue a reboot command but usually I have to force a hard shutdown with the power button.