uvcvideo issue with kernel 3.5-rc2 and 3

uvcvideo issue with kernel 3.5-rc2 and 3

[Philipp Dreimann]

Hello,

my external webcam from Logitech (I guess it's a c910) stopped working
using kernel 3.5-rc3.( 3.4 worked fine.)

uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
input: UVC Camera (046d:0821) as
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.2/input/input14
usbcore: registered new interface driver uvcvideo
USB Video Class driver (1.1.1)
uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 3 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 7 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 11 on unit 2: -71 (exp. 1).
uvcvideo: Failed to query (GET_DEF) UVC control 4 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 5 on unit 2: -71 (exp. 1).
uvcvideo: Failed to query (GET_CUR) UVC control 11 on unit 2: -71 (exp. 1).
uvcvideo: Failed to query (GET_DEF) UVC control 8 on unit 2: -71 (exp. 2).
uvcvideo: Failed to query (GET_DEF) UVC control 1 on unit 2: -71 (exp. 2).
uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
(the last line is being repeated...)

I used cheese to test the webcam. My other webcam is working fine:
uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b217)
input: Integrated Camera as
/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.6/1-1.6:1.0/input/input13

Thanks,
Philipp Dreimann

Re: uvcvideo issue with kernel 3.5-rc2 and 3

[Laurent Pinchart]

Hi Philipp,

On Sunday 17 June 2012 13:35:07 Philipp Dreimann wrote:
> Hello,
> 
> my external webcam from Logitech (I guess it's a c910) stopped working
> using kernel 3.5-rc3.( 3.4 worked fine.)
> 
> uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
> input: UVC Camera (046d:0821) as
> /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.2/input/input14
> usbcore: registered new interface driver uvcvideo
> USB Video Class driver (1.1.1)
> uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 3 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 7 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 11 on unit 2: -71 (exp. 1).
> uvcvideo: Failed to query (GET_DEF) UVC control 4 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 5 on unit 2: -71 (exp. 1).
> uvcvideo: Failed to query (GET_CUR) UVC control 11 on unit 2: -71 (exp. 1).
> uvcvideo: Failed to query (GET_DEF) UVC control 8 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to query (GET_DEF) UVC control 1 on unit 2: -71 (exp. 2).
> uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
> uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
> uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
> uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
> (the last line is being repeated...)

This might be cause by a bug in the USB core or in the UVC driver. Would you 
be able to bisect the regression ? Or, alternatively, test the v3.4 uvcvideo 
driver on v3.5-rc3 ? Or the other way around, test the latest v4l tree on v3.4 
(instructions regarding how to compile the v4l tree with a different kernel 
are available at 
http://linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-
DVB_Device_Drivers).

> I used cheese to test the webcam. My other webcam is working fine:
> uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b217)
> input: Integrated Camera as
> /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.6/1-1.6:1.0/input/input13

-- 
Regards,

Laurent Pinchart

Re: uvcvideo issue with kernel 3.5-rc2 and 3

[Philipp Dreimann]

On 18 June 2012 12:41, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> This might be cause by a bug in the USB core or in the UVC driver. Would you
> be able to bisect the regression ?
Are you aware of any tool to bisect such issues using
kvm/virtualbox/..? I would like to bisect the issue but rebooting the
system needs to be avoided.

> Or, alternatively, test the v3.4 uvcvideo
> driver on v3.5-rc3 ? Or the other way around, test the latest v4l tree on v3.4
> (instructions regarding how to compile the v4l tree with a different kernel
> are available at
> http://linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-
> DVB_Device_Drivers).
I compiled the 3.4 module with 3.5-rc3. The error is still the same
using usb2. I tried to connect the camera to an usb3 port and it
worked as it should. -- The issue seems to be related to usb2 then.

I'll inform the usb guys.

Regards,
 Philipp Dreimann