USB sound devices get index of 0 instead of PCI/onboard sound

Bug #46998 reported by fubarbundy on 2006-05-27
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)

Bug Description

To reproduce: on a machine with a working sound card at index 0 (listed in gnome-volume-control under file/change device as '0: xxxx', plug in a USB sound device (especially something like a microphone, webcam etc.) Reboot.

Result: USB device steals index 0 and ALSA assigns it default status. Any other programs using /dev/dsp break.

Expected result: PCI and other internal devices get assigned lowest indexes first, ensuring they have a dependable device node. USB devices then get given higher indexes/nodes as they are less permanent.

Emmet Hikory (persia) wrote :

This is especially annoying when the USB audio device has no output functionality (say, a MIDI Controller). One must either unplug on each boot, or adjust the default settings.

Changed in linux-source-2.6.15:
status: Unconfirmed → Confirmed
Marten Klencke (mklencke) wrote :

Could the cause be the same as for bug 6367?

Daniel T Chen (crimsun) wrote :

Hash: SHA1
Format: 1.7
Date: Thu, 17 Aug 2006 00:34:10 +0100
Source: alsa-driver
Binary: linux-sound-base alsa-source alsa-base
Architecture: source
Version: 1.0.11-5ubuntu1
Distribution: edgy
Urgency: low
Maintainer: Debian ALSA Maintainers <email address hidden>
Changed-By: Daniel T Chen <email address hidden>
 alsa-base - ALSA driver configuration files
 alsa-source - ALSA driver sources
 linux-sound-base - base package for ALSA and OSS sound systems
Closes: 377716 380490
 alsa-driver (1.0.11-5ubuntu1) edgy; urgency=low
   * Merge from Debian unstable. The following Ubuntu changes remain:
     - Only ship modprobe configuration,
     - Remove default mode,
     - Invoke modprobe with -Qb and command line options,
     - Remove modprobe post-install script in favour of using udev,
     - Merge Debian 1.0.11-5's apm script into the initscript, and
       continue to ship the initscript in the apm scripts dir,
     - Don't allow snd-usb-audio to grab the default index, 0
       (Closes Ubuntu: #31109, #46996, #46998).
 alsa-driver (1.0.11-5) unstable; urgency=low
   [ Elimar Riesebieter ]
   * Added mixer store and restore functions to the apm script.
     (closes: #380490)
 alsa-driver (1.0.11-4) unstable; urgency=low
   [ Elimar Riesebieter ]
   * Use lsb init-functions in init script. Thanks Carlos Villegas
     (closes: #377716)
 256738ac1bf8a5fd5d259728a06012d4 805 sound optional alsa-driver_1.0.11-5ubuntu1.dsc
 4a14e37eaba5b34a4484c35f32d7c27b 181583 sound optional alsa-driver_1.0.11-5ubuntu1.diff.gz
Version: GnuPG v1.4.3 (GNU/Linux)

Changed in alsa-driver:
status: Confirmed → Fix Committed
Daniel T Chen (crimsun) on 2006-08-30
Changed in alsa-driver:
status: Fix Committed → Fix Released
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