From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from galahad.ideasonboard.com ([185.26.127.97]:57211 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755174AbaJHKWj (ORCPT ); Wed, 8 Oct 2014 06:22:39 -0400 From: Laurent Pinchart To: "Artem S. Tashkinov" Cc: mchehab@osg.samsung.com, linux-media@vger.kernel.org Subject: Re: Intermittent Logitech C510 problems (with kernel OOPSes) Date: Wed, 08 Oct 2014 13:22:43 +0300 Message-ID: <4947599.bpC5FBQtce@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 Artem, On Tuesday 07 October 2014 11:48:48 Artem S. Tashkinov wrote: > Hi, > > I posted a bug report almost a year ago and since it's got zero > attention so far I'm writing to this mailing list. I've CC'ed the linux-media mailing list, as it wasn't in the recipients list of your e-mail. > My problem is that video capturing doesn't work on Logitech C510 webcam > in some cases. > > Mind that audio input always works. > > Video capturing is guaranteed not to work after I reboot from Windows 7. > > In rare cases it doesn't work when I cold boot straight into Linux. > > When I try to capture - either there's no signal and capturing fails to > initiate or I get a black screen (a LED on the webcam doesn't turn on in > both cases). > > If I rmmod ehci_hcd and then modprobe ehci_hcd and uvcvideo, then > everything starts working again. > > https://bugzilla.kernel.org/show_bug.cgi?id=67551 The kernel log warning message is caused by an issue I'm aware of. I'll try to fix it ASAP, but due to attending conferences next week I might get a bit delayed. -- Regards, Laurent Pinchart