From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from perceval.ideasonboard.com ([95.142.166.194]:37123 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751468Ab2FRKlv (ORCPT ); Mon, 18 Jun 2012 06:41:51 -0400 From: Laurent Pinchart To: Philipp Dreimann Cc: linux-media@vger.kernel.org Subject: Re: uvcvideo issue with kernel 3.5-rc2 and 3 Date: Mon, 18 Jun 2012 12:41:59 +0200 Message-ID: <4704338.LhTThHjxGK@avalon> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-media-owner@vger.kernel.org List-ID: 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 (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