Comment 9 for bug 807584

I can't do that because I can't launch a terminal, switching to text console does not work and you can't ssh in the machine.

However, X itself is not frozen. I can move the mouse, activate top panel thingies and so on. Pressing the power button shuts down the machine cleanly.

I have run apport-collect on this machine many times and the data can be found in e.g. bug 801034.