Requesting information how to decouple front/rear audio outputs (A1220P)

Hello everyone, and thank you very much for Bazzite!

All the hype around this OS made me very curious, so I decided to install it and try it out. First time using Universal Blue, so these are exciting times. It’s probably a bit too restricted for a daily driver, but I’m enjoying it so far, it is Linux, after all. 🙂

Please accept my apologies for creating a new ticket. I did see the other posts related to this topic (one from 2024 and one from this summer), but one has no replies, and the other isn’t truly solved—the user simply found a workaround by using their monitor’s audio jack.

Here is the problem: when my front combo jack is plugged in, the rear audio (line out) becomes muted. I haven’t dug deeply into this yet; I thought it was worth asking here first in case there is an easy solution I’m missing. My audio chip is an ALC1220P, and every other OS I’ve tried handles the sinks correctly (Ubuntu, Arch, Windows, etc.). On those systems, I can easily switch between them in the audio mixer. This issue only happens on Bazzite.

I tried disabling Auto-Mute in ALSA Mixer, but then both outputs become active, and in a very strange way:
  • If I set the output to headphones, the line-out becomes almost twice as loud, as if both signals were being added together.
  • If I set it to line-out, the volume returns to normal, but audio still plays through both the speakers and the headphones.
What I would like is the ability to switch cleanly between the outputs, just like on every other OS. I can’t imagine this is by design, I shouldn’t have to get up, go to my computer, and physically plug or unplug a jack just to switch audio outputs. So something must be wrong on my end. Does anyone have any idea what I might be doing wrong?

Thank you very much in advance.

P.S.: It’s not a huge issue, but the digital display on my CPU cooler doesn’t work under Bazzite. Is there a TRCC alternative in the store? I couldn’t find anything.
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