Created attachment 573800 [details]
My monitor is connected via HDMI. I configured "Analog Stereo Duplex" to be my default audio device. I play some music and everything works fine. Then the monitor goes into powersave mode. Waking it up will cause pulseaudio to switch to HDMI killing the lovely music I am currently listening to.
This caused me quite some headache. In the end I removed snd_hda_codec_hdmi and finally pulseaudio behaves OK. Of course it won't let me use HDMI anymore as audio device...
The issue here: I had enabled this module since ages (AFAIK since I use that PC which is years), I also use pulseaudio since years. But this issue popped up just after the last update which didn't include the linux kernel. pulseaudio went from 12.2 to 12.2-r1. Downgrading to 12.2 didn't help. I am running kde plasma and got an update to plasma-pa, there is a new patch to move from GConf to gsettings, which seems to be the only thing that really changed, probably it messed up my config.
I really have no clue which package really caused the issue, so I will attach the list with recent upgrades.
I don't experience such problems, albeit it does sometimes switch me to some IEC thing when I unplug external sound card headset or something. No switching to HDMI at least. CCing plasma maintainers in case they know about the gconf/gsettings aspects, etc.
Created attachment 574928 [details]
Pulseaudio did it again. Last Update was on April 24th. No pulseaudio affected, still running the same kernel.
The Screenshot shows the plasma-pa-interface with the output channel and the output of lsmod. As you can see the HDMI module isn't even loaded. I have no idea why pulseaudio still switches channels.