On Mon, 10 Jan 2011, Chris wrote: > Hi, > > I am using a new Logitech C910 usb webcam plugged into an OMAP3530 > embedded board using Kernel 2.6.32 > > Getting this error after a period of correct operation: > [ 2890.610992] uvcvideo: Failed to query (135) UVC control 2 (unit 2) : -110 (exp. 2). > [ 2890.939117] uvcvideo: Failed to query (135) UVC control 2 (unit 2) : -110 (exp. 2). > [ 2891.267242] uvcvideo: Failed to query (135) UVC control 3 (unit 2) : -110 (exp. 2). > [ 2891.595367] uvcvideo: Failed to query (135) UVC control 7 (unit 2) : -110 (exp. 2). > [ 2891.923492] uvcvideo: Failed to query (135) UVC control 11 (unit 2) : -110 (exp. 1). > [ 2892.251617] uvcvideo: Failed to query (135) UVC control 4 (unit 2) : -110 (exp. 2). > [ 2892.579742] uvcvideo: Failed to query (135) UVC control 5 (unit 2) : -110 (exp. 1). > [ 2892.907867] uvcvideo: Failed to query (135) UVC control 8 (unit 2) : -110 (exp. 2). > [ 2893.235992] uvcvideo: Failed to query (135) UVC control 1 (unit 2) : -110 (exp. 2). > > The only way to bring it back - that I have found so far - is a system reboot. > Other USB devices connected to the same controller do not work after the camera fails which indicates a controller crash? > I have tried 6 other cameras that all have the same issue. > > I have been talking with Laurent Pinchart who maintains the UVC driver for Linux who suggested I contact the USB mailing list. > > Any ideas on a possible solution? Have you verified that the camera works okay on a normal PC as opposed to your embedded system? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
