[    8.160759] uvcvideo: Found UVC 1.00 device BisonCam, NB Pro (5986:0203)
...running fsck in the meantime...
[  102.188017] ehci_hcd 0000:00:1d.7: force halt; handhake f803a024 00004000 
00000000 -> -110
[  102.191531] hub 1-0:1.0: cannot reset port 6 (err = -108)

r...@machine:~# lsmod | grep uvc
uvcvideo               59016  0
videodev               36672  1 uvcvideo
v4l1_compat            14496  2 uvcvideo,videodev

On my LG X110-L.A7SAG (which is quite a clone of MSI Wind) running
Jaunty with the Kernel Backports ppa of user a7x, this happens since
udev 145-1 appeared, and through the kernel 2.6.31-X rc-pre-releases
until current 2.6.31-10.34 and udev 147. Earlier (without packages
requiring newer udev) the ehci_hcd force halt didn't happen when udev
was held on Jaunty's 141-1.2.

Symptoms are very similar to the original report. Found it happens
always after cold start (power off, USB devices without power, power
cable disconnected before). 50/50 when rebooting warm with "init 6".
When ehci_hcd force halt doesn't occur after reboot, system is running
stable and USB 2.0 devices work normal (external DVB-T stick (dib0700)
and external generic USB storage). Changing/Removing USB devices shows
no effect, the devices are plugged in before start.

I noticed (and this seems to be normal, I'dont know if it's important)
boot behaviour on USB is different in cold/warm start. The light of my
GSM modem (Huawei E169G on USB 1.1) shows a reset on cold boot and
normal operation on warm boot. The 2.0 devices don't indicate, means I
cannot see if they are reset or not at cold boot. syslog doesn't tell
what happens.

echi_hcd force halt during boot always happens *after* devices are
detected and DVB-T stick is initialized successfully (with successful
firmware load on cold boot). I suspected a coincidence with hal start
but upgrade to hal 0.5.13-1ubuntu7 didn't help. I appreciate debug
hints.

syslog extract attached.

-- 
regression: uvcvideo module makes "cannot reset port" error on usb with bison 
webcam (5986:0203): USB and suspend fails
https://bugs.launchpad.net/bugs/435352
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