Public bug reported:
when using ladspa plugins in a custom .asoundrc when using pulseaudio
applications fail to work with the following output:
~$ aplay tmp/foo.wav
ALSA lib pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM amp
aplay: main:608: audio open error: File exists
example .asoundrc:
pcm.!default {
type plug
slave.pcm amp
}
pcm.amp {
type ladspa
slave.pcm "plughw:0,0";
path "/usr/lib/ladspa";
plugins [
{
label amp
input {
controls [ 6 ]
}
}
]
}
If I remove pulseaudio binary from /usr/bin and reboot (to start a fresh) the
ladspa plugin works perfectly.
~$ lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10
~$ apt-cache policy libasound2
libasound2:
Installed: 1.0.20-3ubuntu6.1
Candidate: 1.0.20-3ubuntu6.1
Version table:
*** 1.0.20-3ubuntu6.1 0
500 http://mirror.aarnet.edu.au karmic-updates/main Packages
100 /var/lib/dpkg/status
1.0.20-3ubuntu6 0
500 http://mirror.aarnet.edu.au karmic/main Packages
ProblemType: Bug
Architecture: amd64
Date: Sun Jan 31 08:53:17 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: vmnet vsock vmci vmmon
Package: libasound2 1.0.20-3ubuntu6.1
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-17.54-generic
SourcePackage: alsa-lib
Uname: Linux 2.6.31-17-generic x86_64
XsessionErrors: (polkit-gnome-authentication-agent-1:3653): GLib-CRITICAL **:
g_once_init_leave: assertion `initialization_value != 0' failed
** Affects: alsa-lib (Ubuntu)
Importance: Undecided
Status: Invalid
** Tags: amd64 apport-bug
--
ladspa plugins in .asoundrc and pulseaudio don't play nice
https://bugs.launchpad.net/bugs/514902
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