Public bug reported:

Suddenly my keyboard and mouse stopped working. I wasn't doing anything
special (firefox + vinagre opened). This happened at least twice to me
in the past 2 weeks.

Keyboard was completely unresponsive (CAPS, NUMLOCK not working).

I could see that the machine was still running, so I ssh'd into it and
fixed the problem my forcing a keyboard driver reload.

I reused the following program:

$ cat local/bin/fixmouseaftersuspend 
echo -n "i8042" > /sys/bus/platform/drivers/i8042/unbind
echo -n "i8042" > /sys/bus/platform/drivers/i8042/bind

which I use to reenable the mouse after a resume from suspend. (see
#214985)

This solved my problem. Nothing interesting in dmesg it seems (no i8042
message related at all)

* Hardware: Lenovo 3000 N100.
* Distrib: Hardy as of 13/Apr/2008
* compiz enabled.
* I had freshly booted the machine and lost the wireless connection some 
minutes ago, then reconnected.

** Affects: ubuntu
     Importance: Undecided
         Status: New

-- 
mouse & keyboard became suddenly completely unresponsive
https://bugs.launchpad.net/bugs/216927
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