[pulseaudio-tickets] [Bug 104408] New: loopback on ladspa-sink: huge, persistent delay introduced by VT switch

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=104408

Bug ID: 104408
   Summary: loopback on ladspa-sink: huge, persistent delay
introduced by VT switch
   Product: PulseAudio
   Version: unspecified
  Hardware: Other
OS: All
Status: NEW
  Severity: normal
  Priority: medium
 Component: modules
  Assignee: pulseaudio-bugs@lists.freedesktop.org
  Reporter: da...@magex.hu
QA Contact: pulseaudio-bugs@lists.freedesktop.org
CC: lenn...@poettering.net

I use the following "chain" for VoIP audio processing:

# VoIP apps: higher tone
load-module module-ladspa-sink sink_name=spk-voip-eq-out plugin=mbeq_1197
label=mbeq
control=-30.0,-19.1,-18.6,-18.6,-18.6,-10.0,-8.0,-6.5,1.5,1.5,1.5,8.5,10.6,10.6,10.6
# VoIP apps: joint volume control
load-module module-null-sink sink_name=spk-voip-vol-out
sink_properties='device.description="Speaker VoIP Volume Out"'
load-module module-loopback source=spk-voip-vol-out.monitor
sink=spk-voip-eq-out latency_msec=4

The problem is a huge, persistent, 100% reproducible delay that appears on the
loopback after VT switch. The delay could be 5 seconds or even more, followable
on volume meters of pavucontrol. No problem if loopback's sink is other
loopback or hardware device instead of ladspa-sink OR user is a member of the
`audio` group thus access is not suspended on VT switch. Need to restart
pulseaudio to get rid of the introduced delay. Temporary moving of loopback's
sink to other loopback or hardware device eliminates the delay but it returns
after restore. Pulseaudio does not log anything that worth to mention.

I have nothing special in my PA config but I can share as is if necessary.
Fedora 27, pulseaudio-11.1-7.fc27.x86_64

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[pulseaudio-tickets] [Bug 100488] Intel HDMI LPE driver doesn't work well with PulseAudio

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=100488

--- Comment #53 from Hans de Goede  ---
Tanu,

Thank you for all your work on this! I don't think I will find time to test
this before 2018 :), but I will definitely give this a try soonish.

Regards,

Hans

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[pulseaudio-tickets] [Bug 100488] Intel HDMI LPE driver doesn't work well with PulseAudio

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=100488

--- Comment #52 from Tanu Kaskinen  ---
(In reply to Tanu Kaskinen from comment #51)
> I now submitted patches for the automatic stream moving:
> https://patchwork.freedesktop.org/patch/195132/
> https://patchwork.freedesktop.org/patch/195133/

The second patch is buggy. v2 here:
https://patchwork.freedesktop.org/patch/195135/

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[pulseaudio-tickets] [Bug 100488] Intel HDMI LPE driver doesn't work well with PulseAudio

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=100488

--- Comment #51 from Tanu Kaskinen  ---
I now submitted patches for the automatic stream moving:
https://patchwork.freedesktop.org/patch/195132/
https://patchwork.freedesktop.org/patch/195133/

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[pulseaudio-tickets] [Bug 100488] Intel HDMI LPE driver doesn't work well with PulseAudio

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=100488

--- Comment #50 from Tanu Kaskinen  ---
It was reported that even with all patches applied, PulseAudio still was being
killed when unplugging the HDMI cable. I have now submitted a fix for this.

Here's the complete list of patches related to this bug that are not yet in
master:

Jack detection fixes:
https://patchwork.freedesktop.org/patch/181163/
https://patchwork.freedesktop.org/patch/181164/
https://patchwork.freedesktop.org/patch/181165/

Infinite loop fixes (only the first patch is needed, but if there are still
problems, the last two patches will make debugging easier):
https://patchwork.freedesktop.org/patch/195092/
https://patchwork.freedesktop.org/patch/195091/
https://patchwork.freedesktop.org/patch/195093/

After these patches there still remains the problem that PulseAudio doesn't
automatically move streams away from the HDMI sink when the HDMI cable is
unplugged. I plan to fix that as well.

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