Comment 25 for bug 1238194

I ran into the same problem with my keyboard non-functional after upgrading from 13.04 to 13.10, with encrypted boot filesystem. Appending ohci_pci to /etc/initramfs-tools/modules and invoking update-initramfs -u resolved my problem. I feel lucky as having the older kernel still available made this relatively easy to execute. That and having my tablet available (while my ubuntu computer was unusable) to hunt up this bug reference to find a solution.