I have a Framework laptop 16 which has been working flawlessly. I used Ubuntu 24.04 LTS until I recently updated to Ubuntu 24.04.1 LTS. I like the new version but noticed a change to my computer. The audio plug expansion card stopped working after the upgrade. Worked fine just before the upgrade. I pulled the card and plugged it back it hoping it would reload the peripheral drivers, but it didn’t work. Hoping to see if others have the same issue and if there are any fixes. In the meantime I will continue to troubleshoot.
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Check the kernel version you are running after the upgrade. Maybe he gave you a different kernel.
Not sure what the kernal for 24.04 LTS was, but the kernal for 24.04.1 LTS is Linux 6.8.0-44-generic.
Solved. Found article at Enable PipeWire on Ubuntu 22.04 · GitHub
Installed wireplumber using:
$ sudo apt install pipewire-media-session- wireplumber
Start wireplumber using
$ systemctl --user --now enable wireplumber.service
Install ALSA plugin
$ sudo apt install pipewire-audio-client-libraries
Restarted the computer and now it sees the audio expansion card.
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Awesome @Steve_Gill! Glad to hear you found the solution. Others are likely to come across that issue with the Audio Expansion Card. 
Thank you for sharing your solution. 
If I remember what I heard correctly, Canonical has temporarily stopped upgrading people from 22.04 to 24.x because of critical issues with the upgrade. I don’t know any more than that though.
Yeah. What a mess. Details are here (sort of): Bug #2078720 “Upgrading from jammy to noble results in a linux-h...” : Bugs : linux-gcp package : Ubuntu
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