Help! I have upgraded from 11.10 to 12.04 but it doesn't pick up the keyboard so I cannot type in my login keyring password to do anything. I have tried a spare USB keyboard but this is not picked up either. Any if I put a USB stick in the menu comes up and I can open and edit a document - keyboard must work! Any ideas? I get an error message - cannot capture your keyboard so cannot get past 'Enter password to unlock your login keyring.'
I have solved both keyboard and networking issues (keyboard not recognized and no network connection) by rolling back to kernel 3.0.0-15-generic-pae.
Just selected 3.0.0-15 in "Previous Linux Versions" section of GRUB menu.
If that works yuo couldalso uninstall newer kernel (sudo apt-get remove 184.108.40.206) and update GRUB (sudo update-grub).
Hope this helps.
I have a similar problem, and can get around it by clicking cancel on the keyring login. Not sure if that helps or not. Unity still not working for me though !!