I seem to have the same problem, my USB keyboard (Kinesis Advantage USB) works for BIOS and is accepted once linux loads but GRUB wont respond to keypresses during the boot and OS selection process. I'm using SUSE10 with kernal 2.6.13 and my motherboard is a new Jetway 939GT4-SLI. I am a
I did switch the boot loader via YAST2 from GRUB to LILO but LILO has the same problem as GRUB.
I will be staying with GRUB until a solution is found.