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
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. 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. 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
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-
pulseaudio[2325]: [pulseaudio] module-