Find solution for pulseaudio ver 1:10.0-2ubuntu3 with snd_hdmi_lpe_audio

[sundarnagarajan]

Currently snd_hdmi_lpe_audio is blacklisted
We would like HDMI sound to work
Need to track upstream ALSA / Pulseaudio fixes

[sundarnagarajan]

Currently blacklist snd_hdmi_lpe_audio ONLY if pulseaudio version >= 1:10.0-2ubuntu3 - i.e. ONLY on Artful Aardvark 17.10

[khurshid-alam]

I am experiencing some problem with ear-phone plugged into 3.5mm jack. The sound comes after a pause and the disappears. This happens frequently on 17.10 after I blacklisted ipe_audio. Is this somewhat related? Pulseaudio throws nothing other than "Fails to initialize". But after i restarts pulseaudio, it starts working again.

[sundarnagarajan]

Please see first item in FAQ: How to report a problem.

Try to do MORE WORK ON YOUR SIDE to provide AS MUCH related information as possible, so that I can do LESS work to HELP YOU.

[sundarnagarajan]

This problem persists as of Ubuntu Bionic Beaver 18.04

pulseaudio 12.0 was released on Jun-20-2018.

In the pulseaudio 12.0 changelog I see this:

Fixed a crash or high CPU use problem with Intel HDMI LPE
Many recent computers use the Intel HDMI LPE kernel driver for HDMI audio, and that driver has some unususal behaviour that made PulseAudio enter an infinite loop with 100% CPU use, if the HDMI cable is unplugged and PulseAudio tries to play to the HDMI output. Usually the playback thread runs with realtime scheduling, and using too much CPU in that situation makes the kernel kill PulseAudio, so effectively PulseAudio appeared to be crashing. This problem has now been fixed.

Presumably, once pulseaudio 12.0 hits Ubuntu, this problem will be resolved.

pulseaudio 12.0 debs can be found in the debian repositories:

To install pulseaudio 12.0 in Ubuntu Bionic Beaver 18.04 you need the following DEBs:

• pulseaudio_12.0-1_amd64.deb download sites
• libpulse0_12.0-1_amd64.deb download sites
• libsoxr0_0.1.2-3_amd64.deb download sites

I have not tried installing these during the remaster process (yet)