On a fresh install on older dell P4, I've been unable to get the usb keyboard to respond.
It responds at the grub screen, but once past there... no response I am running thru a kvm switch, but don't really have the option without a fair bit of juggling to try it with everything hooked direct. I have tried plugging a keyboard direct, with no result. One other time, long ago, I hit this same problem and it turned out to be a bios setting. I don't recall what it was now, but did find some info in a KVM manual that says the two items below might need setting: Set HALT ON ERROR to ALL BUT KEYBOARD. In PNP AND PCI SETUP, set PNP OS INSTALLED to YES and set USB IRQ to ENABLED. My bios do not show anything that seems to be similar or even related, other than a setting to have keyboard errors reported or not... and I tried that both ways. This is a Dell system SX280 and says it is bios revision A08. I've not seen this particular setup before and it looks unusual to me. It has headings for: System Drivers Onboard Devices Video Performance Security Power Management Maintenance Post Behavior And a list of things under each. I'm not going to try to snarfle all that by hand unless it seems likely to be helpful. But I can say that after a thorough look at them all, I didn't see anything that seemed to be related. Anyone have ideas on this?