Did it ever work with Linix? You need legacy devices just to get things going in Linix, otherwise, you maybe attacking several problems and not know it, dealing with one. Return to PS/2 to see if everything settles down and then start the USB kybd. problem. If that's the problem alone then find a driver to attach it. Remember USB isn't activate until seen later system wise, thus all has to be OK before hand. On top of this you have a wireless setup, make sure that is also Linix capable with a driver. These are my best guesses, but divide and conquer to resolve problems.
So I am at a loss as to what to do as I do not want to switch back to the PS/2. I have the Microsoft Wireless Desktop with the MS comfort keyboard and Optical Mouse connected via USB. I have a dual boot with XP and Fedora Core 4 and when the boot loader/GRUB pops up the keyboard does not respond so that I can boot inbo Linux. I first noticed this on the install of FC4 when at the initial prompt on whether to use the graphical or text interface to install the keyboard did not respond, but luckily it defaulted into the graphical interface. However, right now I can not boot into Linux. How do I get around this? I have already moved the receiver around to different USB ports on my Dell 8100 with a P4 2.6 powerleap upgrade. Please help!