[Bug 1913632] [NEW] Ubuntu 20.10 Pulseaudio won't recognize audio line-out until pulseaudio restarted

Thu Jan 28 18:11:00 UTC 2021

Public bug reported:

Ubuntu 20.10 (PopOS on a custom Skylake generation server, not System76)

Problem started occurring after upgrade from Ubuntu 20.04 to Ubuntu
20.10 PopOS.  System never experienced this problem before that upgrade
and it's a 5 year old server.

Pulseaudio does not recognize speakers attached to green line-out port
of built-in analog card.  This is temporarily corrected by restarting
pulseaudio service.  However, upon next reboot the problem reoccurs.
Thus, requiring a pulseaudio restart after every reboot.

To reproduce problem:
1.  Speakers plugged in (through green line-out port of built-in card) and speakers are powered on
2.  Restart Linux (either after hard power off, or reset, or soft reboot, doesn't matter.  BIOS changes do nothing.)
3.  System comes up, and pulseaudio dashboard shows no built-in analog stereo under "Output Devices"
4.  Restart pulseaudio:  systemctl --user restart pulseaudio.service
5.  Pulseaudio dashboard now shows built-in analog stereo under "Output Devices"

CONFIGURATION INFORMATION:

cat /etc/issue
Pop!_OS 20.10

uname -a
Linux walkubu 5.8.0-7630-generic #32~1609193707~20.10~781bb80-Ubuntu SMP Tue Jan 5 21:29:56 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

arecord -L
null
    Discard all samples (playback) or generate zero samples (capture)
default
    Playback/recording through the PulseAudio sound server
samplerate
    Rate Converter Plugin Using Samplerate Library
speexrate
    Rate Converter Plugin Using Speex Resampler
jack
    JACK Audio Connection Kit
oss
    Open Sound System
pulse
    PulseAudio Sound Server
upmix
    Plugin for channel upmix (4,6,8)
vdownmix
    Plugin for channel downmix (stereo) with a simple spacialization
hw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Direct hardware device without any conversions
hw:CARD=PCH,DEV=2
    HDA Intel PCH, ALC1150 Alt Analog
    Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Hardware device with all software conversions
plughw:CARD=PCH,DEV=2
    HDA Intel PCH, ALC1150 Alt Analog
    Hardware device with all software conversions
sysdefault:CARD=PCH
    HDA Intel PCH, ALC1150 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Front output / input
dsnoop:CARD=PCH,DEV=0
    HDA Intel PCH, ALC1150 Analog
    Direct sample snooping device
dsnoop:CARD=PCH,DEV=2
    HDA Intel PCH, ALC1150 Alt Analog
    Direct sample snooping device
usbstream:CARD=PCH
    HDA Intel PCH
    USB Stream Output
hw:CARD=C525,DEV=0
    HD Webcam C525, USB Audio
    Direct hardware device without any conversions
plughw:CARD=C525,DEV=0
    HD Webcam C525, USB Audio
    Hardware device with all software conversions
sysdefault:CARD=C525
    HD Webcam C525, USB Audio
    Default Audio Device
front:CARD=C525,DEV=0
    HD Webcam C525, USB Audio
    Front output / input
dsnoop:CARD=C525,DEV=0
    HD Webcam C525, USB Audio
    Direct sample snooping device
usbstream:CARD=C525
    HD Webcam C525
    USB Stream Output
usbstream:CARD=NVidia
    HDA NVidia
    USB Stream Output

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1913632

Title:
  Ubuntu 20.10 Pulseaudio won't recognize audio line-out until
  pulseaudio restarted

Status in systemd package in Ubuntu:
  New

Bug description:
  Ubuntu 20.10 (PopOS on a custom Skylake generation server, not
  System76)

  Problem started occurring after upgrade from Ubuntu 20.04 to Ubuntu
  20.10 PopOS.  System never experienced this problem before that
  upgrade and it's a 5 year old server.

  Pulseaudio does not recognize speakers attached to green line-out port
  of built-in analog card.  This is temporarily corrected by restarting
  pulseaudio service.  However, upon next reboot the problem reoccurs.
  Thus, requiring a pulseaudio restart after every reboot.

  To reproduce problem:
  1.  Speakers plugged in (through green line-out port of built-in card) and speakers are powered on
  2.  Restart Linux (either after hard power off, or reset, or soft reboot, doesn't matter.  BIOS changes do nothing.)
  3.  System comes up, and pulseaudio dashboard shows no built-in analog stereo under "Output Devices"
  4.  Restart pulseaudio:  systemctl --user restart pulseaudio.service
  5.  Pulseaudio dashboard now shows built-in analog stereo under "Output Devices"

  CONFIGURATION INFORMATION:

  cat /etc/issue
  Pop!_OS 20.10

  uname -a
  Linux walkubu 5.8.0-7630-generic #32~1609193707~20.10~781bb80-Ubuntu SMP Tue Jan 5 21:29:56 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

  arecord -L
  null
      Discard all samples (playback) or generate zero samples (capture)
  default
      Playback/recording through the PulseAudio sound server
  samplerate
      Rate Converter Plugin Using Samplerate Library
  speexrate
      Rate Converter Plugin Using Speex Resampler
  jack
      JACK Audio Connection Kit
  oss
      Open Sound System
  pulse
      PulseAudio Sound Server
  upmix
      Plugin for channel upmix (4,6,8)
  vdownmix
      Plugin for channel downmix (stereo) with a simple spacialization
  hw:CARD=PCH,DEV=0
      HDA Intel PCH, ALC1150 Analog
      Direct hardware device without any conversions
  hw:CARD=PCH,DEV=2
      HDA Intel PCH, ALC1150 Alt Analog
      Direct hardware device without any conversions
  plughw:CARD=PCH,DEV=0
      HDA Intel PCH, ALC1150 Analog
      Hardware device with all software conversions
  plughw:CARD=PCH,DEV=2
      HDA Intel PCH, ALC1150 Alt Analog
      Hardware device with all software conversions
  sysdefault:CARD=PCH
      HDA Intel PCH, ALC1150 Analog
      Default Audio Device
  front:CARD=PCH,DEV=0
      HDA Intel PCH, ALC1150 Analog
      Front output / input
  dsnoop:CARD=PCH,DEV=0
      HDA Intel PCH, ALC1150 Analog
      Direct sample snooping device
  dsnoop:CARD=PCH,DEV=2
      HDA Intel PCH, ALC1150 Alt Analog
      Direct sample snooping device
  usbstream:CARD=PCH
      HDA Intel PCH
      USB Stream Output
  hw:CARD=C525,DEV=0
      HD Webcam C525, USB Audio
      Direct hardware device without any conversions
  plughw:CARD=C525,DEV=0
      HD Webcam C525, USB Audio
      Hardware device with all software conversions
  sysdefault:CARD=C525
      HD Webcam C525, USB Audio
      Default Audio Device
  front:CARD=C525,DEV=0
      HD Webcam C525, USB Audio
      Front output / input
  dsnoop:CARD=C525,DEV=0
      HD Webcam C525, USB Audio
      Direct sample snooping device
  usbstream:CARD=C525
      HD Webcam C525
      USB Stream Output
  usbstream:CARD=NVidia
      HDA NVidia
      USB Stream Output

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