USB mouse not working on 8.0-RELEASE

[Ondřej Majerech]

Hello,

I've just upgraded my box to 8.0-RELEASE (FreeBSD starlight
8.0-RELEASE FreeBSD 8.0-RELEASE #9: Mon Nov 23 17:52:12 CET 2009
root at starlight:/usr/obj/usr/src/sys/STARLIGHT  i386) via csup'ing to
RELENG_8_0 and the usual suite of buildworld, buildkernel,
installkernel, mergemaster -p, installworld, mergemaster.

My USB mouse doesn't work now.  While booting, I can see error
messages from the USB part of the kernel; the same messages also
reappear when I disconnect and reconnect the thing.  They read the
following: (Grabbed from /var/log/messages after having dis- and
re-connected the mouse.)

Nov 23 18:54:19 starlight kernel: usb_alloc_device:1586: set address 2
failed (USB_ERR_TIMEOUT, ignored)
Nov 23 18:54:20 starlight kernel: usb_alloc_device:1624: getting
device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
Nov 23 18:54:21 starlight kernel: usbd_req_re_enumerate:1539: addr=2,
set address failed! (USB_ERR_TIMEOUT, ignored)
Nov 23 18:54:22 starlight kernel: usbd_req_re_enumerate:1553: getting
device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
Nov 23 18:54:24 starlight kernel: usbd_req_re_enumerate:1539: addr=2,
set address failed! (USB_ERR_TIMEOUT, ignored)
Nov 23 18:54:25 starlight kernel: usbd_req_re_enumerate:1553: getting
device descriptor at addr 2 failed, USB_ERR_TIMEOUT!
Nov 23 18:54:25 starlight kernel: ugen0.2: <(null)> at usbus0 (disconnected)
Nov 23 18:54:25 starlight kernel: uhub_reattach_port:435: could not
allocate new device!

The mouse was working without any problems whatsoever on 8.0-RC3 and
all older FBSD versions that I used.

Other USB devices work as they should, without producing anything
unusual in dmesg.

So, what's up?  Any clues?

~ Ondra