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[BUG][CML][UCM2][HDA]Output device will auto switch from speaker to other source when unplug HDMI external port or headphone #2346
Description
Describe the bug
Output device will auto switch from speaker to other source when unplug HDMI external port or headphone.
Precondition:
1.Install ubuntu 20.04
UCM2: https://github.com/alsa-project/alsa-ucm-conf(commit: 3e897306)
Alsa-lib: http://sof-ci-storage.sh.intel.com/share/alsa/alsa-lib/latest/libasound2_1.2.3.2-a3ca480/
Pulseaudio: http://sof-ci-storage.sh.intel.com/share/pulseaudio/latest/pulseaudio_13.99.1.1-47d8112/
Gnome: 1:3.36.2-0ubuntu1++testswitch - can download form Canonical:
sudo add-apt-repository ppa:hui.wang/switch-audio
sudo apt-get update
sudo apt install gnome-control-center
To Reproduce
step 1: Boot up system with headphone and HDMI external port both connected
step 2: Open sound setting and select speaker as output device (corner case, as speaker has lowest priority)
step 3: Unplug HDMI external port.
step 4: Check the output device.
Reproduce rate
5/5
Expected result
Output source will stay in speaker.
Actual result
Output source will auto switch to headphone from speaker after unplugged HDMI external port.
Test recipe
Platform: CML laptop with onboard codec ALC3204 in HDA mode
Firmware: (3d8a0ac) https://github.com/thesofproject/sof/commits/master
Kernel: (06accba) https://github.com/thesofproject/linux/commits/topic/sof-dev
Topology: file: tools/topology/sof-hda-generic-2ch.tplg same as firmware
UCM2: https://github.com/thesofproject/alsa-ucm-conf/commits/master (commit: 3e897306)
Pulseaudio: pulseaudio (47d8112)
Activity
libinyang commentedon Aug 6, 2020
compare to #2126, this bug happens on HDA platform. This should be the pulseaudio issue. As this is a case that customer/user rarely meet, let's put it to P3.
plbossart commentedon Aug 11, 2020
Why the HDA label when this happens on a SoundWire platform where HDA is not used at all?
libinyang commentedon Aug 12, 2020
@plbossart Thanks for pointing it out. The description is updated
plbossart commentedon Sep 3, 2020
@libinyang can we please try and close all those UCM2 issues? There's only few remaining.
libinyang commentedon Sep 4, 2020
Sure, I will debug on it.
libinyang commentedon Sep 16, 2020
The bug root cause is in pulseaudio. I will file a bug in https://gitlab.freedesktop.org/pulseaudio/pulseaudio. And hopefully I will submit a patch to pulseaudio to fix this issue this week.
The root cause is: when unplugging the HDMI, it will trigger to call switch_from_port(). It will compare the priority of the ports. This will cause pulseaudio pick up the headphone ahead of speaker. So the active port is changed to headphone. SOF + SDW platform works well because speaker and headphone are in different sinks. The "sink" mechanism makes sure that the speaker won't be switched to headphone. So this bug only happens on SOF + HDA platforms.
libinyang commentedon Sep 18, 2020
patch has been submitted: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/370
plbossart commentedon Sep 30, 2020
@libinyang doesn't look like we have a solution based on the PulseAudio discussions?
libinyang commentedon Oct 26, 2020
Tanu gave some comments. I'm confirming with him for his idea.
plbossart commentedon Jun 10, 2021
@libinyang @mengdonglin is this issue fixed? It's been 3 quarters already.
libinyang commentedon Jun 15, 2021
The bug is already fixed and we can close it now.
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