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.
This solution might work as suggested by Andrew @ http://www.webupd8.org/2013/10/ubuntu-1310-available-for-download.html
GO TO:
1) System Settings > Language Support, or you can hit Super (Windows key) to open the Dash, then type Language Support
2) At the bottom part find "Keyboard input method system"
3) Switch between "Default", "IBus" and "None". It may be different in your case, so try each one out. Start with option None.
4) After making the change, you need to restart for the settings to take effect.
Below is a screenshot.