Looks like it is a kernel driver's problem. Could you install the 18.04's kernel under 20.04 to test?
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1887210 Title: USB DAC/AMP unselectable from Sound Settings and crashes alsamixer Status in alsa-driver package in Ubuntu: Confirmed Bug description: I am experiencing the same issue with the same device described in this report comment: https://bugs.launchpad.net/ubuntu/+source/alsa- driver/+bug/1267866/comments/26 The device works as expected with Windows 10 and macOS no drivers required. However, the device is not an option from Ubuntu's sound settings. It is visible in alsamixer, however, it crashes immediately upon selection with 'cannot load mixer controls: Broken pipe'. Here's some more debug information. Let me know if there is anymore I can provide or feel free to redirect me if there is another place this is better reported. Device: Schiit Audio Fulla 3 USB DAC/AMP Kernel version: 5.4.0-40-generic Ubuntu version: 20.04 Alsa debug output: http://alsa- project.org/db/?f=3f494b2155bdde7f5ee0e52240da77468bc1111b `dmesg -w` output upon re-plugging in the device: [ 895.624302] usb 3-2.3: new high-speed USB device number 8 using xhci_hcd [ 895.739125] usb 3-2.3: New USB device found, idVendor=30be, idProduct=0100, bcdDevice= 1.02 [ 895.739129] usb 3-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 895.739131] usb 3-2.3: Product: I'm Fulla Schiit [ 895.739133] usb 3-2.3: Manufacturer: Schiit Audio [ 896.076914] input: Schiit Audio I'm Fulla Schiit as /devices/pci0000:00/0000:00:07.1/0000:11:00.3/usb3/3-2/3-2.3/3-2.3:1.3/0003:30BE:0100.0007/input/input20 [ 896.136457] hid-generic 0003:30BE:0100.0007: input,hidraw5: USB HID v1.00 Device [Schiit Audio I'm Fulla Schiit] on usb-0000:11:00.3-2.3/input3 [ 896.228480] audit: type=1107 audit(1594446870.681:57): pid=1286 uid=105 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="CheckPermissions" name=":1.8" mask="receive" pid=10228 label="snap.spotify.spotify" peer_pid=1287 peer_label="unconfined" exe="/usr/bin/dbus-daemon" sauid=105 hostname=? addr=? terminal=?' [ 896.238190] usb 3-2.3: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1 [ 896.298659] usb 3-2.3: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1 [ 896.427249] usb 3-2.3: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1 [ 896.618498] usb 3-2.3: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x1100, type = 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1887210/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
