Ubuntu 12.04 upgrade - keyboard problems

view story

http://askubuntu.com – I made an upgrade from 10.04 to 12.04. It all went smooth, more or less, but at end I have the real problem - my keyboard is not working! I tried both USB/PS2 keyboards, but it's the same story (mouse is working). So, I can type my password on login screen, and after successful login, I can't use my keyboard at all. What's funny, when I change switch to Guest user keyboard is working. Form that Guest session I can login via "ssh -X" with my user name and keyboard is working perfectly, both in terminal and every program I start. I tried everything I encountered on the web with "keyboard probl (HowTos)