From: Clemens Ladisch <clemens@ladisch.de>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.39.2: alsa question: usb sound/card shows up as mixer1/audio1?
Date: Fri, 22 Jul 2011 10:04:17 +0200 [thread overview]
Message-ID: <4E292F01.1040400@ladisch.de> (raw)
In-Reply-To: <alpine.DEB.2.02.1107141656480.10111@p34.internal.lan>
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
next prev parent reply other threads:[~2011-07-22 8:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-14 21:01 2.6.39.2: alsa question: usb sound/card shows up as mixer1/audio1? Justin Piszcz
2011-07-22 8:04 ` Clemens Ladisch [this message]
2011-07-22 10:17 ` Justin Piszcz
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