After running a software upgrade yesterday (10 October 2023) with sudo pacman -Syu, my PinePhone ended up with no sound.

See this post on the Manjaro forum for my fix. To summarize:

  • I downgraded everything by following the “Downgrading all upgraded packages” section in this article (parsing /var/log/pacman.log and restoring from /var/cache/pacman/pkg/), and uninstalled alsa-ucm-pinephone. I then re-upgraded and manually reinstalled alsa-ucm-pinephone, and it just magically worked.
  • I suspect an easier fix will be to just edit /usr/share/alsa/ucm2/conf.d/simple-card/PinePhone.conf and only keep Syntax 2 and the SectionUseCase."HiFi" and SectionUseCase."Voice Call" sections, and remove everything else.