Comment 27 for bug 231049

Something else occured to me about this. When this happens is the USB device connected to the port whilst the BIOS is POSTing?

For PCs who's BIOS support boot from USB this might/would trigger the BIOS into initialising at least one USB host controller which would claim the external port(s). It wouldn't surprise me if the BIOS only supported USB v1.1 and effectively tied the affected ports to the v1.1 controller.