I have a Belkin Omniview SE 4, a four port KVM, with keyboard and
mouse provided to a Linux box via USB.

Under 2.4.23, the device works well. The keyboard and mouse are
detected.

Under 2.6.0 (Debian build), the keyboard is not recognized.

I have verified that hid and usbkbd are loaded, and if I plug a USB
keyboard directly into the machine, the keyboard is recognized
properly.

/proc/bus/usb is empty -- with 2.4, I would have gone there to verify
that the device was seen. Is there any data I can pull from 2.6 which
might help diagnose this?

Is /proc/bus/input/handlers the proper analog?

pbit:/proc/bus/input# cat handlers
N: Number=0 Name=kbd