Bug 11920

Summary: gspca does not recognize supported camera
Product: Drivers Reporter: Julian Petri (delefoo)
Component: Video(Other)Assignee: Jean-Francois Moine (moinejf)
Status: CLOSED PATCH_ALREADY_AVAILABLE    
Severity: normal CC: moinejf
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.27-7 Subsystem:
Regression: --- Bisected commit-id:

Description Julian Petri 2008-10-31 08:54:12 UTC 
Latest working kernel version: -
Earliest failing kernel version: 2.6.27
Distribution: Ubuntu Intrepid
Hardware Environment: Desktop computer, USB Webcam with vendor/product id 0x0c45:0x602c
Software Environment:
Problem Description: The built-in gspca driver (new in kernel 2.6.27) does not recognize the camera 0x0c45:0x602c . gspca driver is not applied for the device.

Steps to reproduce: Blacklist the sn9c102 driver that Ubuntu loads when plugging in the camera (this driver does not work). Reboot. Plug in the camera. dmesg:

[ 3010.468023] usb 1-1: new full speed USB device using ohci_hcd and address 7
[ 3010.677667] usb 1-1: configuration #1 chosen from 1 choice

nothing more. The webcam is not available in Ekiga, Cheese or Skype.
Comment 1 Jean-Francois Moine 2008-11-04 23:08:18 UTC 
(In reply to comment #0)
    [snip]
> Steps to reproduce: Blacklist the sn9c102 driver that Ubuntu loads when
> plugging in the camera (this driver does not work). Reboot. Plug in the
> camera.
    [snip]
> nothing more. The webcam is not available in Ekiga, Cheese or Skype.

Putting the sn9c102 in the black list does not work because the vend:prod of the webcam is not defined in gspca at generation time. You must do a kernel 'make config', remove the sn9c102 driver and recompile.
Comment 2 Julian Petri 2008-11-06 08:21:21 UTC 
(In reply to comment #1)
> (In reply to comment #0)
>     [snip]
> > Steps to reproduce: Blacklist the sn9c102 driver that Ubuntu loads when
> > plugging in the camera (this driver does not work). Reboot. Plug in the
> camera.
>     [snip]
> > nothing more. The webcam is not available in Ekiga, Cheese or Skype.
> 
> Putting the sn9c102 in the black list does not work because the vend:prod of
> the webcam is not defined in gspca at generation time. You must do a kernel
> 'make config', remove the sn9c102 driver and recompile.
> 

Yes, thank you. I have looked at the kernel code and found the following to methods to make the camera work:

Firstly, as you wrote, removing the sn9c102 driver makes the cam work correctly.

Secondly, removing the line

	{USB_DEVICE(0x0c45, 0x602c), SB(OV7630, 102)},

from the construct

#if !defined CONFIG_USB_SN9C102 && !defined CONFIG_USB_SN9C102_MODULE
...
#endif

and pasting it ouside the construct makes the camera work, too (with blacklisting sn9c102)