[pulseaudio-discuss] Ubuntu or PulseAudio Bug?

[Tanu Kaskinen]

On Sun, 2013-01-20 at 14:13 -0800, Justin Chudgar wrote:
> Following is one of the last attempts I made. I've experimented with
> just the onboard IntelHDA and with just the ancient Ensonic PCI. I've
> verified that the ladspa filter works using the 'applyfilter' and
> 'analyzefilter' ladspa tools.
> 
> I have also let module-udev-detect find the card(s) and used pacmd to
> add the filter manually with the same symptom of sound no longer coming
> from the speakers.

Loading module-ladspa-sink with the parameters that you use resulted in
the following:

D: [pulseaudio] module-ladspa-sink.c: Module: lowpass_iir_1891
D: [pulseaudio] module-ladspa-sink.c: Label: lowpass_iir
D: [pulseaudio] module-ladspa-sink.c: Unique ID: 1891
D: [pulseaudio] module-ladspa-sink.c: Name: Glame Lowpass Filter
D: [pulseaudio] module-ladspa-sink.c: Maker: Alexander Ehlert <mag at glame.de>
D: [pulseaudio] module-ladspa-sink.c: Copyright: GPL
D: [pulseaudio] module-ladspa-sink.c: Port 0 is control: Cutoff Frequency
D: [pulseaudio] module-ladspa-sink.c: Port 1 is control: Stages(2 poles per stage)
D: [pulseaudio] module-ladspa-sink.c: Port 2 is input: Input
D: [pulseaudio] module-ladspa-sink.c: Port 3 is output: Output
D: [pulseaudio] module-ladspa-sink.c: Will run 2 plugin instances
D: [pulseaudio] module-ladspa-sink.c: Trying to read 2 control values
D: [pulseaudio] module-ladspa-sink.c: cdata: '110,0.755'
D: [pulseaudio] module-ladspa-sink.c: Read config value 110.000000 (p=0)
D: [pulseaudio] module-ladspa-sink.c: Read config value 0.755000 (p=1)
W: [pulseaudio] module-ladspa-sink.c: Control value 1 below lower bound: 0.755000 (lower bound: 1.000000)
E: [pulseaudio] module-ladspa-sink.c: Failed to parse, validate or set control parameters
Segmentation fault

So, the parameter for "Stages" seems to be invalid, and that then
triggers some bug in pulseaudio.

-- 
Tanu