Comment 47 for bug 296710

http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=commit;h=462941e9684b5f55b13617e726c54ade0495465a

While not a show stopper, this warning is an indication of a fairly major annoyance. If you insert a USB 1.0 peripheral, and then insert a USB 2.0 peripheral in any other port, you are likely to only get USB 1.0 transfer speeds from your USB 2.0 peripheral. This race can only be solved conclusively by always loading ehci before uhci/ohci. Many folks have forced this sequence in initramfs, but the best solution is in the kernel (as always).