I recently put a new motherboard in my computer, an Aopen Ak77-600N (based on the VIA KT600 chipset). I couldn't get USB 2.0 working, but that's ok, speed isn't much of a problem

. The problem is that there are 4 USB ports on the back of the mobo, but only 2 of them work. The other 2 show no signs of life whatsoever. There's no jumper setting for turning them on on the motherboard, so I might be missing something in the kernel? I'm using 2.6.7 with the usb-uhci drivers.