@Marius and @Michael: I confirm your workaround *works*. Same machine (Dell M4800). At least we can recover it and don't have to reboot for now. Working on Ubuntu 14.04.
@Marius and @Michael: I confirm your workaround *works*. Same machine (Dell M4800). At least we can recover it and don't have to reboot for now. Working on Ubuntu 14.04.