[pulseaudio-tickets] [Bug 79280] New: loading alsa-sinks including ladspa-filters fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79280

          Priority: medium
            Bug ID: 79280
                CC: lennart at poettering.net
          Assignee: pulseaudio-bugs at lists.freedesktop.org
           Summary: loading alsa-sinks including ladspa-filters fails
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: der_papst_623ea at hotmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: alsa
           Product: PulseAudio

Created attachment 99905
  --> https://bugs.freedesktop.org/attachment.cgi?id=99905&action=edit
my asoundrc including the rl-crossover

(As requested in the faq, i mention this bug occured on Kubuntu, but it was
reproduced by an user of #alsa on Debian)

I've created a Linkwitz-Riley-crossover (4th order) in .asoundrc for upmixing
2.0->2.1 (see attached .asoundrc). The crossover works great with aplay or with
vlc when selected as alsa output device.

I can load any pcm from .asoundrc as alsa-sink, as long as there's no
ladspa-filter in the signal chain.

But when i do pactl load-module module-alsa-sink device=upmixplug, it fails
with:
I: [pulseaudio] client.c: Created 7 "Native client (UNIX socket client)"
D: [pulseaudio] protocol-native.c: Protocol version: remote 28, local 28
I: [pulseaudio] protocol-native.c: Got credentials: uid=1000 gid=1000 success=1
D: [pulseaudio] protocol-native.c: SHM possible: yes
D: [pulseaudio] protocol-native.c: Negotiated SHM: yes
D: [pulseaudio] module-augment-properties.c: Looking for .desktop file for
pactl
D: [pulseaudio] alsa-util.c: Trying upmixplug with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open upmixplug
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Invalid argument
D: [pulseaudio] alsa-util.c: Trying upmixplug without SND_PCM_NO_AUTO_FORMAT
...
D: [pulseaudio] alsa-util.c: Managed to open upmixplug
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:upmixplug with SND_PCM_NO_AUTO_FORMAT
...
D: [pulseaudio] alsa-util.c: Managed to open plug:upmixplug
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:upmixplug without
SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open plug:upmixplug
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_any() failed: Invalid argument
I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on
plug:upmixplug: Invalid argument
E: [pulseaudio] module.c: Failed to load module "module-alsa-sink" (argument:
"device=upmixplug"): initialization failed.
D: [pulseaudio] module-udev-detect.c: /dev/snd/controlC0 is accessible: yes
I: [pulseaudio] client.c: Freed 7 "pactl"
I: [pulseaudio] protocol-native.c: Connection died.


I get the same result with any other pcm from .asoundrc when a ladspa-filter is
in the signal chain.
Before trying to load a sink, i've always unloaded the soundcard (D2X) from PA
to avoid any chance of a collision.

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