in this log i see only the usb-host part. Can you please reload uvcvideo
module with:
rmmod uvcvideo && modprobe uvcvideo trace=0xfff
and attach the log again.

on my logitech cam you can bring it to freeze if you starts the video
and stop it before it actually starts. So may be your app send some
command before other was finished.

Am Dienstag, den 22.02.2011, 11:53 +1100 schrieb linux newbie:
> [  515.220000] hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0004
> [  515.220000] str8100-ehci str8100-ehci: GetStatus port 2 status
> 001009 POWER sig=se0 PEC CONNECT
> [  515.220000] hub 1-0:1.0: port 2 enable change, status 00000501
> [  515.220000] hub 1-0:1.0: port 2 disabled by hub (EMI?), re-enabling...
> [  515.220000] hub 1-0:1.0: port 2, status 0501, change 0002, 480 Mb/s
> [  515.220000] usb 1-2: USB disconnect, address 2
> [  515.220000] usb 1-2: unregistering device
> [  515.220000] usb 1-2: usb_disable_device nuking all URBs
> [  515.220000] str8100-ehci str8100-ehci: shutdown urb c3fbe000 ep1in-iso
> [  515.220000] str8100-ehci str8100-ehci: shutdown urb c3c4d000 ep1in-iso
> [  515.220000] str8100-ehci str8100-ehci: shutdown urb c3fbf800 ep1in-iso
> [  515.220000] str8100-ehci str8100-ehci: shutdown urb c3fbf000 ep1in-iso
> [  515.220000] str8100-ehci str8100-ehci: shutdown urb c3fbe800 ep1in-iso
> [  515.260000] usb 1-2: unlink qh16-0001/ffc02100 start 15 [1/0 us]
> [  515.260000] str8100-ehci str8100-ehci: shutdown urb c3c5b540 ep3in-intr
> [  515.260000] usb 1-2: unregistering interface 1-2:1.0
> [  515.270000] usb 1-2:1.0: uevent
> [  515.270000] usb 1-2: unregistering interface 1-2:1.1
> [  515.270000] usb 1-2:1.1: uevent
> [  515.280000] usb 1-2: unregistering interface 1-2:1.2
> [  515.280000] usb 1-2:1.2: uevent
> [  515.280000] usb 1-2: unregistering interface 1-2:1.3
> [  515.280000] usb 1-2:1.3: uevent
> [  515.280000] usb 1-2: uevent
> [  515.340000] str8100-ehci str8100-ehci: GetStatus port 2 status
> 001002 POWER sig=se0 CSC
> [  515.340000] hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0004
> 
> 
> On Wed, Feb 16, 2011 at 6:07 AM, Laurent Pinchart
> <laurent.pinch...@ideasonboard.com> wrote:
> > Hi,
> >
> > On Wednesday 02 February 2011 01:07:41 linux newbie wrote:
> >> I developed one application that keeps on reading one frame of data
> >> from camera. If I connect MS Lifecam, I am getting USB disconnect
> >> event randomly. But this is not happening in Logitech versions of
> >> Camera.
> >>
> >> Has anyone came across this sort of issue? Is there any solution worth
> >> trying it?
> >
> > Kernel log ?
> >
> > --
> > Regards,
> >
> > Laurent Pinchart
> >
> _______________________________________________
> Linux-uvc-devel mailing list
> Linux-uvc-devel@lists.berlios.de
> https://lists.berlios.de/mailman/listinfo/linux-uvc-devel

-- 
Regards,
        Alexey

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