Confirming error on Ubuntu 16.04 and Cambridge Audio DAC Magic Plus. The USB device does not list with lsusb and removing fwupd does no difference. Worked flawlessly with Ubuntu 15.10.
Except from syslog: kernel: [41856.060179] usb 3-6: 1:1: usb_set_interface failed (-71) systemd-udevd[18617]: Process '/usr/sbin/alsactl -E HOME=/run/alsa restore 2' failed with exit code 99. pulseaudio[2325]: [pulseaudio] module-alsa-card.c: Failed to find a working profile. pulseaudio[2325]: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="2" name="usb-Cambridge_Audio_Cambridge_Audio_USB_Audio_2.0_0000-00" card_name="alsa_card.usb-Cambridge_Audio_Cambridge_Audio_USB_Audio_2.0_0000-00" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed. pulseaudio[2325]: [pulseaudio] module-udev-detect.c: Tried to configure /devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6:1.0/sound/card2 (alsa_card.usb-Cambridge_Audio_Cambridge_Audio_USB_Audio_2.0_0000-00) more often than 5 times in 10s -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574079 Title: USB audio device is not recognized after startup in 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1574079/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
