If this has already been asked, my apologies, I did not find it before writing this. So please do point me to the correct page.

Anyway, I have this weird issue on my laptop right now. The keyboard is not functioning 100%. This means, I can type my login details to get into Ubuntu. I can type something on Dash. But other than this (on the desktop), no output from the keyboard when using all the other apps - as in I start to type and nothing comes out.

The surprising thing is that when I shift to Guest session, the keyboard functions normally.

When I shift to another TTY, like Alt+F5, keyboard works normally.

This is the first time I've encountered this so far in my use of Linux. Keyboards normally never fail on any of the desktop environments I've used over the years.

Any ideas what's happening? Could be the config files on my home is too messy already. I've upgraded this from 11.10 to 13.04, then now 13.10 without a re-install. Works fine so far, until now that I can't do much without a keyboard.

Thanks in advance!

P.S. Mouse and touchpad works fine.