On Saturday, April 04, 2015 2:41:12 PM lee wrote:
> I always can't remember which keys to press with that, so I have it
> disabled.
> 
> And when the keyboard is unresponsive, it won't work.

It will in many cases (probably most). Usually it's xorg that "freezes" the 
keyboard, in those cases ctrl-alt-sysrq-r followed by ctrl-alt-f1 should get 
you to the VT where you can restart xorg. I think the kernel needs to be 
completely locked with interrupts disabled or locked in a higher priority 
interrupt (unlikely) for it not to work or the USB stack totally broken. I can 
see some of the commands failing or even completely locking the kernel if 
something's really messed up.

-- 
Fernando Rodriguez

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