Verification done on the Disco, it fixed the problem. On the lenovo P520, I installed the disco (19.04), edit the /etc/apt/sources.list to add disco-proposed repository, then run apt-get update abd sudo apt install pulseaudio, now the pulseaudio is: ii pulseaudio 1:12.2-2ubuntu3.1 amd64 PulseAudio sound server ii pulseaudio-utils 1:12.2-2ubuntu3.1 amd64 Command line tools for the PulseAudio sound server
recording: plug a mic into the front audio jack, and select it from sound-setting, use arecord to record sound, after recording, unplug the front mic and plug it to rear mic, use arecord to record sound again, it still can record sound. playback: plug a headphone to rear lineout and select lineout as output device, then play sound via totem, after a while, close the totem and unplug the rear lineout and plug the headphone to front headphone jack, use totem to play sound, I can hear the sound from front headphone. ** Tags removed: verification-needed-disco ** Tags added: verification-done-disco -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1834138 Title: PA: Don't restore the streams to sinks/sources with only unavailable ports To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1834138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs