On a Dell Inspiron e1705 running Feisty, suspend/resume worked fine
until this one time. The touchpad and keyboard were unresponsive after
resuming. I plugged in a USB keyboard to diagnose the problem.

Doing the i8042 unbind before suspend and bind after resume did not fix
the problem. I got the touchpad back (scrolling works fine), but every
time I press a key on the laptop keyboard, I get the following messages
in my kernel log:

atkbd.c: Unknown key pressed (raw set 2, code 0x101 on isa0060/serio0).
atkbd.c: Use 'setkeycodes 01 <keycode>' to make it known.

So the keyboard is still on the fritz after doing the unbind/rebind.

-- 
i8042 unbind required for keyboard/mouse to be useable following suspend/resume 
& hibernate/resume cycle
https://bugs.launchpad.net/bugs/23497
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