I had this trouble at installation and after installion. My system freezes at the point where it seems to scan USB port with keyboard connected, last few line:
usb2: <UHCI (generic) USB controller> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
If I put keyboard to another port, number will change to that port. I can solve this trough BIOS, changing option "USB Keyboard Support Via" from BIOS to OS, but then I can't use bootloader menu and it took quite while to find out whats going on at installation.
I'm using PCBSD 7.1
My keyboard is Logitech Classic Keyboard 200 with none extra keys (execpt those Windows keys).
My MOBO is Abit IP35I with P35 chipset from Intel, Northbridge is ICH9. And the USB controller:
uhci2@pci0:0:26:2: class=0x0c0300 card=0x1101147b chip=0x29398086 rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '82801IB/IR/IH (ICH9 Family) USB Universal Host Controller'
class = serial bus
subclass = USB
EDIT. I suppose that better place for this would have been Startup/Installation Bug Reports?