Sound card randomly disappearing/disconnecting in Ubuntu 26.04

Hi everyone,

I own a Digidesign Mbox 2 sound card, and have been using it with Ubuntu with no problems. Since I upgraded to 26.04, the sound card disappears randomly with the audio output cutting out and the device disappearing from the output menu.

If I enter alsa force-reload into the terminal, the sound card will come back and continue to work. Is there anything I can do to prevent the sound card from disconnecting randomly?

According to my kernel logs (journalctl -k), the modern USB 3.0 controller is forcing a hardware reset because it loses patience with the old device's timing drifts: usb 1-1: reset full-speed USB device using xhci_hcd. Right after that, PipeWire panics with a "No such device" error and crashes.

So far, I've tried several software tweaks: I disabled USB autosuspend and LPM via GRUB quirks, increased the ALSA period-size and headroom to 1024 in WirePlumber, and disabled driver power-saving in modprobe.

Update: I now installed Ubuntu 24.04 back onto my system, everything was working fine until some software update which probably installed the new kernel 6.17.0-35-generic, causing the sound card to dissappear again.