From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: Re: Kernel: snd-usb-audio: probe of 2-2:1.0 failed with error -5 Date: Tue, 29 Nov 2011 18:20:35 +0100 Message-ID: <4ED51463.6050005@gmail.com> References: <4ED4D58D.60109@nixbits.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bw0-f51.google.com (mail-bw0-f51.google.com [209.85.214.51]) by alsa0.perex.cz (Postfix) with ESMTP id 21D7D2435C for ; Tue, 29 Nov 2011 18:20:42 +0100 (CET) Received: by bkat8 with SMTP id t8so9425121bka.38 for ; Tue, 29 Nov 2011 09:20:41 -0800 (PST) In-Reply-To: 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: Linus Torvalds Cc: Takashi Iwai , admin@nixbits.org, alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On 11/29/2011 05:58 PM, Linus Torvalds wrote: > On Tue, Nov 29, 2011 at 4:52 AM, Nixbits Admin wrote: >> >> While knowing that your time is precious and without wanting to making you >> spend more than what you may be able to spare for my problem; i would like >> ask you if you could take a look at this issue. >> >> https://forums.gentoo.org/viewtopic-p-6885908.html#6885908 >> >> snd-usb-audio: probe of 2-2:1.0 failed with error -5 > > This is related to the line above it: > > Nov 29 07:21:21 kernel: skipping empty audio interface (v1) > Nov 29 07:21:21 kernel: snd-usb-audio: probe of 2-3:1.0 failed with error -5 > > which in turn is because of a zero "bInCollection" value in the device > control header. I'm adding some sound people to the cc, in case > anybody has more clues about what's wrong with that particular device > - I don't personally have any real clue about usb audio. As the dump in the forum post doesn't decode any of the USB audio specific headers, we'd need to see the output of "lsusb -v" with that device connected. If the driver bails out at this point, there's something wrong with the descriptors, or the interface has no audio support at all (which would be odd as it could have been omitted entirely in the first place). We might have to add a quirk for the device, let's see. Daniel