Comment 16 for bug 106289

Same problem with Dell Precision 380. I have an old, expensive ergonomic keyboard that uses PS/2. The system's own setup menus and GRUB loader have no problem seeing this keyboard, but as soon as Feisty Fawn starts up, nada. I tried the "acpi=off" trick even though the keyboard doesn't have any power management buttons; I didn't expect it to work and it didn't. I don't know how to disable USB keyboard support in the BIOS so didn't try that. Of course no problem using a USB keyboard.

I tested a PS/2 to USB adapter and it seems to work OK, so I have ordered one for myself. But it does seem like a pretty serious omission not to support PS/2. The joy of distros like Ubuntu is having them run nicely on older hardware, extending their useful life considerably.