From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751984Ab1GVIBs (ORCPT ); Fri, 22 Jul 2011 04:01:48 -0400 Received: from smtprelay03.ispgateway.de ([80.67.18.15]:37379 "EHLO smtprelay03.ispgateway.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750755Ab1GVIBr (ORCPT ); Fri, 22 Jul 2011 04:01:47 -0400 Message-ID: <4E292F01.1040400@ladisch.de> Date: Fri, 22 Jul 2011 10:04:17 +0200 From: Clemens Ladisch User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Justin Piszcz CC: linux-kernel@vger.kernel.org Subject: Re: 2.6.39.2: alsa question: usb sound/card shows up as mixer1/audio1? References: In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Df-Sender: linux-kernel@cl.domainfactory-kunde.de Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Justin Piszcz wrote: > I bought two of these but they are actually different devices, on one host > it works ok, on the other, I get this: > ... > $ cat /proc/asound/cards > 1 [Device ]: USB-Audio - C-Media USB Audio Device > C-Media USB Audio Device at usb-0000:00:1d.7-2.4, full speed > > On the working host: > $ cat /proc/asound/cards > 0 [Device ]: USB-Audio - USB PnP Sound Device > C-Media Electronics Inc. USB PnP Sound Device at usb-0000:00:1d.7-2.4, full spe > > Any clue why one is mapped to [1] and the other [0], where the one that is > [0] works properly and the [1] does not? Some distributions configure USB devices to not load at index 0 to prevent conflicts with the primary PCI sound card. Have a look into /etc/modprobe.d/. Regards, Clemens