I have encountered the same problem on my 2.6.27-9 version. on 12/14 my 
quickcap pro for notebooks worked perfectly as soon as I plugged it in:
-----------------------
Dec 14 12:11:01 toshiba kernel: [  587.920067] usb 1-1: new full speed USB 
device using uhci_hcd and address 3
Dec 14 12:11:02 toshiba kernel: [  588.257016] usb 1-1: configuration #1 chosen 
from 1 choice
Dec 14 12:11:02 toshiba kernel: [  589.059751] Linux video capture interface: 
v2.00
Dec 14 12:11:05 toshiba kernel: [  592.085093] uvcvideo: Found UVC 1.00 device 
<unnamed> (046d:08c3)
Dec 14 12:11:06 toshiba kernel: [  592.108176] input: UVC Camera (046d:08c3) as 
/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1:1.0/input/input8
Dec 14 12:11:06 toshiba kernel: [  592.114441] usbcore: registered new 
interface driver snd-usb-audio
Dec 14 12:11:06 toshiba kernel: [  592.118576] usbcore: registered new 
interface driver uvcvideo
Dec 14 12:11:06 toshiba kernel: [  592.118597] USB Video Class driver (v0.1.0)  
-----------------------
Couple days and few required updates later it stopped working with failed query 
and initialization failed -5 code messages:
-----------------------
Dec 17 23:16:36 toshiba kernel: [  184.904083] usb 1-1: new full speed USB 
device using uhci_hcd and address 3
Dec 17 23:16:37 toshiba kernel: [  185.230971] usb 1-1: configuration #1 chosen 
from 1 choice
Dec 17 23:16:37 toshiba kernel: [  185.669168] Linux video capture interface: 
v2.00
Dec 17 23:16:37 toshiba kernel: [  185.710851] uvcvideo: Found UVC 1.00 device 
<unnamed> (046d:08c3)
Dec 17 23:16:38 toshiba kernel: [  186.713610] uvcvideo: Failed to query (135) 
UVC control 1 (unit 0) : -110 (exp. 26).
Dec 17 23:16:39 toshiba kernel: [  187.717445] uvcvideo: Failed to query (129) 
UVC control 1 (unit 0) : -110 (exp. 26).
Dec 17 23:16:39 toshiba kernel: [  187.717467] uvcvideo: Failed to initialize 
the device (-5)
-----------------------
Is there a problem with some of the updates I've recently installed or is it 
somewhere else. I'd be happy to provide more info from my logs and 
configuration files if needed. Please let me know if there is anything I could 
do to restore webcam operation. Thank you.

-- 
uvcvideo module randomly fails to load
https://bugs.launchpad.net/bugs/241753
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