Bug#853132: pulseaudio-module-jack: modules fail to load due to real-time scheduling

[Felipe Sateler]

Control: severity -1 normal

On 5 February 2017 at 12:06, Vít Novotný <witiko at mail.muni.cz> wrote:
> On Sat, Feb 04, 2017 at 09:59:50AM -0300, Felipe Sateler wrote:
>> On 30 January 2017 at 13:33, Vít Novotný <witiko at mail.muni.cz> wrote:
>> >     ( 631.872|   0.000) I: [pulseaudio] module-stream-restore.c: Restoring volume for sink input sink-input-by-application-name:mpv Media Player.
>> >     ( 631.872|   0.000) I: [pulseaudio] module-stream-restore.c: Restoring mute state for sink input sink-input-by-application-name:mpv Media Player.
>> >     ( 631.872|   0.000) D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.pci-0000_00_1f.3.analog-stereo becomes busy, resuming.
>> >     ( 631.872|   0.000) D: [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.pci-0000_00_1f.3.analog-stereo becomes idle, timeout in 5 seconds.
>> >     ( 631.872|   0.000) D: [pulseaudio] memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4, prebuf=0, minreq=1 maxrewind=0
>> >     ( 631.872|   0.000) D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432, base=4, prebuf=0, minreq=4 maxrewind=0
>> >     ( 631.872|   0.000) I: [pulseaudio] sink-input.c: Created input 9 "audio stream" on alsa_output.pci-0000_00_1f.3.analog-stereo with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
>>
>> This shows mpv, in the first attempt, still tries to output to the
>> sound card and not to the jack sound server. You can use pavucontrol
>> to move the stream from the sound card to the jack server.
>
> Which is strange, since I changed the default source / sink before I ran
> mpv.

Not really. As the name suggests, the command only sets the default
sink. But there is also the stream-restore module, that remembers
where each stream goes, and tries to restore them to the same output
they were playing to.

> Perhaps this could be the doing of the KDE Plasma component which
> spawns pulseaudio, since this beavior no longer occurs if I kill and
> manually run pulseaudio.

You can also test this by using the KDE control panel to alter the
priority of the jack output.

> I will test whether this bug persists on
> pulseaudio-module-jack 10.0-1 and if so, I will give it a further look
> next week.

OK. In the meantime, I'm downgrading the severity.


-- 

Saludos,
Felipe Sateler