Hello!
We have the problem with linux-5.4.0-48 that the hdmi port 
(alsa_output.pci-0000_01_00.1.hdmi-stereo-extra1) not activ is after boot. 
linux-5.4.0-47 works fine. We use pulse audio. Ubuntu 20.04

linux-5.4.0-48
Active Profile: off

linux-5.4.0-47
Active Profile: output:hdmi-stereo-extra1

Is it possible that this patch the reason is?

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https://bugs.launchpad.net/bugs/1867704

Title:
  alsa/hdmi: support nvidia mst hdmi/dp audio

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