So these are the log messages right after the device failed:

Jan 21 11:20:41 fedora pipewire[2460]: spa.alsa: set_hw_params: Protokollfehler Jan 21 11:20:41 fedora pipewire[2460]: pw.link: 0x55db4830afa0: one of the nodes is in error out:error in:suspended Jan 21 11:20:41 fedora pipewire[2460]: pw.link: 0x55db485f9360: one of the nodes is in error out:error in:suspended Jan 21 11:20:44 fedora pipewire[2460]: spa.alsa: set_hw_params: Protokollfehler Jan 21 11:20:44 fedora pipewire[2460]: spa.alsa: set_hw_params: Protokollfehler Jan 21 11:20:44 fedora pipewire[2460]: spa.alsa: set_hw_params: Protokollfehler Jan 21 11:20:44 fedora pipewire[2460]: pw.link: 0x55db48355240: one of the nodes is in error out:suspended in:error Jan 21 11:20:44 fedora pipewire[2460]: pw.node: (alsa_output.usb-MOTU_M2_M2MT15188F-00.Direct__Direct__sink-56) suspended -> error ((null)) Jan 21 11:20:44 fedora pipewire[2460]: pw.link: 0x55db482bdca0: one of the nodes is in error out:idle in:error Jan 21 11:20:44 fedora pipewire[2460]: pw.link: 0x55db47b39140: one of the nodes is in error out:idle in:error

I have no idea how to unsuspend the device after it errored, nor do I know why it errored. Like I said in the OP I’ve tried turning it off and on again, but the only solution I have found is to reboot which sucks… I changed the sampling rate from 41k to 48k but that didn’t change anything. I have no idea how to change the bit depth of the device though. I applied the fixes from the repo you linked, but I am not able to install the version of alsa they referenced in there. Fedore 41 only comes with the 2 most recent versions it seems…

I will look into that, thanks for your help, time and effort ❤️

A small capture of the log (these errors were repeating multiple times):

Wed 2025-01-15 15:09:47 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: set_hw_params: Protocol error Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.audioadapter: params Spa:Enum:ParamId:EnumFormat: 1:0 (follower format) The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: pw.node: (alsa_output.usb-MOTU_M2_M2MT15188F-00.HiFi__Line1__sink-55) suspended -> error ((null)) Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.audioadapter: params Spa:Enum:ParamId:EnumFormat: 1:0 (follower format) The device or resource is busy/occupied Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: set_hw_params: Protocol error Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: set_hw_params: Protocol error Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: pw.node: (alsa_input.usb-046d_Logitech_Webcam_C925e_AE792FAF-02.analog-stereo-60) suspended -> error ((null)) Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: ‘front:3’: capture open failed: The device or resource is busy/occupied Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: spa.audioadapter: params Spa:Enum:ParamId:EnumFormat: 1:0 (follower format) The device or resource is busy/occupied Wed 2025-01-15 15:09:50 CET fedora user@1000.service/pipewire.service[2482]: spa.alsa: set_hw_params: Protocol error

I translated the error messages, because they were in German.

I think the most important line might be this one as this is the audio device I am actually using:

Wed 2025-01-15 15:09:49 CET fedora user@1000.service/pipewire.service[2482]: pw.node: (alsa_output.usb-MOTU_M2_M2MT15188F-00.HiFi__Line1__sink-55) suspended -> error ((null))

Since they are started with the user session these services do only exist there. If you try to restart them without the flag they just don’t exist.

The journal would be a nice way to look for sure, but the command you posted throws an error for me:

Using --boot or --list-boots with --merge is not supported.

No I have not tried that, though pw-top still worked, in general pipewire still worked, I just didn’t get any sound anymore…

The --user flag commands come from this reddit thread: https://www.reddit.com/r/pop_os/comments/v3g2w9/is_there_a_cli_command_to_restart_pipewire/