I have a computer that I dual boot between Ubuntu 11.10 and Windows 7. I installed Windows first, and Ubuntu second.
When I boot, the GRUB menu comes up, showing me the option to select to boot to Ubuntu at the top of the list, and to boot to Windows at the bottom.
Unfortunately, as far as I can tell, any key I press on the keyboard (connected by USB) does not get any response, so I can't actually select to boot to anything but Ubuntu (which is the default selection).
Once Ubuntu loads and I am at the log in screen, then the keyboard (and mouse) work perfectly normally thereafter.
Why would my keyboard not work only during GRUB? And how do I fix it?