I have the same problem with Mustek gSmart 300 in Jaunty RC. Mustek
gSmart 300 is basically a webcam that was made to look as a digital
camera, has a very small inbuilt memory enough for taking 20-30 pictures
of 640x480. But the webcam functionality is the main reason people
bought it. When the webcam is pluged-in it shows almost the same
behavior as described in bug report #291906 (Mustek gSmart 300 not
working in Ubuntu 8.10) which was marked as duplicate of bug #285682
(Ubuntu 8.10 can't mount digital camera showing a window popup message:
-60 could not lock the device message). This time there is no window
popup message: -60 but there are 3 beeps. The end result is that the
camera is properly detected, but  no /dev/video0 is created. We can see
this from

dmesg
...
[59707.024530] usb 2-2: new full speed USB device using uhci_hcd and address 52
[59707.322348] usb 2-2: configuration #1 chosen from 1 choice
[59707.325155] gspca: probing 055f:c200
[59707.327177] gspca: probe ok
[59707.327245] gspca: probing 055f:c200
[59708.523532] gspca: disconnect complete

As you can see the device is probed twice, and after the second probing
there is some kind of disconnect.

lsmod | grep gspca gives
gspca_spca500          21632  0 
gspca_main             29952  1 gspca_spca500
videodev               41600  1 gspca_main

I found a temporary solution by removing gspca modules from the memory
and then installing them again by:

sudo rmmod gspca_spca500
sudo rmmod gspca_main
sudo modprobe gspca_spca500

After this is done, there are no multiple beeps, and dmesg gives:
...
[60252.278571] usbcore: deregistering interface driver spca500
[60252.280145] spca500: deregistered
[60252.282087] gspca: main deregistered
[60252.306251] gspca: main v2.3.0 registered
[60252.307925] gspca: probing 055f:c200
[60252.309122] gspca: probe ok
[60252.309139] gspca: probing 055f:c200
[60252.309168] usbcore: registered new interface driver spca500
[60252.309173] spca500: registered

This time /dev/video0 is properly created and the webcam works under
skype. It has other problems under cheese, kopete, vlc etc. which I
presume are related to other kind of bugs.

The second temporary solution I found was to kill /usr/lib/gvfs/gvfs-
gphoto2-volume-monitor process before pluging the webcam into the
computer. I didn't post my comment under bug #285682 because the
discussion over there is mostly related to digital cameras and not
webcams and secondly because there was a heated discussion and someone
stating that this is completly normal and this is how things should be,
resulting in bug #285682 status marked as invalid . Please don't forget
that Mustek gSmart 300 is basically a  webcam with a very low sensor
resolution. Can this kind of "multifunctional" webcams be blacklisted
from the gvfs or gphoto2 modules?

p.s. Sebastien Bacher is an idiot

-- 
GSPCA webcam no longer working: no /dev/video0
https://bugs.launchpad.net/bugs/255678
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