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 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
