I (unfortunately) cannot provide any additional debugging info, as I've switched to Debian Wheezy for this workstation.
There appear to be others having the same issue. Some suggestions include running "sudo apt-get -f install", which seems to fix it in xorg, but not in pre-boot. It's as if USB is not getting initialized in the initram. Some URLS are as follows: http://askubuntu.com/questions/128513/mouse-and-keyboard-does-not-work-after-upgrade-to-12-04 http://askubuntu.com/questions/127410/upgrading-to-ubuntu-12-04-loses-keyboard-and-mouse Googling "ubuntu 12.04 usb keyboard" brings up more. I'm sorry that I can't provide any additional info at this point, but my occupation prohibits me from having a down primary workstation. I will see if I can acquire an additional ThinkPad today to provide additional debugging info from. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/990870 Title: External USB keyboard not working in Ubuntu 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/990870/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs