From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: Re: Regression in sound/usb/ Date: Thu, 12 Jul 2012 01:41:45 +0200 Message-ID: <4FFE0F39.8080500@gmail.com> References: <4FF18FCF.6020306@gmail.com> <4FFC9B4F.6060600@gmail.com> <4FFE07EF.6070900@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bk0-f51.google.com (mail-bk0-f51.google.com [209.85.214.51]) by alsa0.perex.cz (Postfix) with ESMTP id 55408246B5 for ; Thu, 12 Jul 2012 01:41:49 +0200 (CEST) Received: by bkcjk13 with SMTP id jk13so1283349bkc.38 for ; Wed, 11 Jul 2012 16:41:49 -0700 (PDT) In-Reply-To: <4FFE07EF.6070900@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Philipp Dreimann Cc: Takashi Iwai , alsa-devel@alsa-project.org, Clemens Ladisch , Joseph Salisbury List-Id: alsa-devel@alsa-project.org On 12.07.2012 01:10, Daniel Mack wrote: > On 11.07.2012 09:30, Philipp Dreimann wrote: > >> The camera is now working for a short time: >> [ 56.421399] usb 2-1.2: new high-speed USB device number 4 using ehci_hcd >> [ 57.224234] uvcvideo: Found UVC 1.00 device (046d:0821) >> [ 57.237221] input: UVC Camera (046d:0821) as >> /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input15 >> Camera and microphone are working. Some time later we're back to the old issue: > > So I found the reason for this breakage now. It's about orphaned packets > that are sent over the wire after alt setting 0 has been selected. The > chipset doesn't like these at and bails out with protocol errors. Fixing > this involves some rework of the logic. The patch is unfortunately a > little big, but I see no option than getting it merged for 3.6. I meant 3.5, of course. > Everyone, please test - and sorry for the trouble caused. To avoid confusion: this patch replaces the other one I sent. Daniel