I have discovered a "dirty fix" conserning this bug. It appears to be
connected to a physical connectivity problem with the rotating Acer
OrbiCam attached to my Acer Aspire 5684WLMi.

During Linux loading, when the computer repeats "... gspca_core.c:
Failed to configure camera" without stopping, I press the camera gently
from pointing at me to pointing upwards, maybe 15 degrees. When I reach
this spot, gspca stops complaining, and Linux loading continues, and I
can stop pressing the camera (and the camera works).

I don't know if this dirty fix only applies to my (maybe badly
connected) camera, but it can be worth a try. I have to do this (almost)
every time I boot up my Ubuntu laptop (sometimes it loads without
problems, and maybe several times in a row if I don't touch the camera
in between). And, off course, I take no responsibility if you damage
your camera/laptop while trying this dirty fix, you do this at your own
risk.

If you don't need the webcam and don't want to wait for a bugfix, you
can simply blacklist gspca. If you are using the webcam you can try to
use this dirty fix.

I have included the dmesg log before and after I do the "dirty fix". As
you can see, before my "fix" the USB device appears to disconnect before
gspca has loaded the driver.

...

[  224.689024] usb 5-4: new high speed USB device using ehci_hcd and address 8
[  224.849020] usb 5-4: configuration #1 chosen from 1 choice
[  224.849409] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 USB GSPCA camera found.(VC0321) 
[  225.056766] usb 5-4: USB disconnect, address 8
[  225.057133] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 Failed to configure camera
[  225.057230] gspca: probe of 5-4:1.0 failed with error -5

[  225.325883] usb 5-4: new high speed USB device using ehci_hcd and address 9
[  225.481826] usb 5-4: configuration #1 chosen from 1 choice
[  225.482391] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 USB GSPCA camera found.(VC0321) 
[  225.690345] usb 5-4: USB disconnect, address 9
[  225.690440] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 Failed to configure camera
[  225.690554] gspca: probe of 5-4:1.0 failed with error -5

(I do the "dirty fix")

[  225.960244] usb 5-4: new high speed USB device using ehci_hcd and address 10
[  226.120216] usb 5-4: configuration #1 chosen from 1 choice
[  226.120801] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 USB GSPCA camera found.(VC0321) 
[  226.348285] usbcore: registered new interface driver gspca
[  226.348299] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c:
 gspca driver 01.00.20 registered

...

-- 
Webcam of my laptop slow down the boot on 7.10
https://bugs.launchpad.net/bugs/172678
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