See https://patchwork.kernel.org/patch/10265345/. Dropping that patch and recompiling the kernel leads to a situation where alsa and pulseaudio seem to to be working again.
Adding default-sample-rate = 48000 to /etc/pulse/daemon.conf leads to working headphones. Maybe the patch has to be adjusted to newer firmware? A quirk seems to be really necessary to avoid the specific patch to daemon.conf. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773697 Title: [USB-Audio - PX USB, playback] snd-usb-audio: probe of 2-3:1.0 failed with error -22 after kernel upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1773697/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
