I was having the same problem on my Thinkpad R51. I found a solution
that worked for me here: http://kogs-www.informatik.uni-
hamburg.de/~meine/thinkpad under the section "Making the Numlock work
again".
Basically just run this command (I put it in my .bash_profile so it is
applied every time I
Sorry, I spoke too soon. This fixed another related problem I was
having using a USB numeric keypad with my Thinkpad, but the problem
with Caps lock setting the Num lock still exists.
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NumLock gets enabled unexpectedly on my laptop
https://bugs.launchpad.net/bugs/92482
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