keyboard entry problem ubuntu 12.04

[som]

hi,
having problem with keyboard of my asus netbook. all of a sudden some keys r not working. eg, pressing 'c','k' produces nothing.'a','s' is working but not the spacebar. using 'onboard' to write this. what could be the problem? using ubuntu 12.04 LTS
uname -a: Linux ray 3.8.0-35-generic #52~precise1-Ubuntu SMP Thu Jan 30 17:27:28 UTC 2014 i686 i686 i386 GNU/Linux

regards,
som
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20140913/69bec4c5/attachment.html>