USB DAC/AMP unselectable from Sound Settings and crashes alsamixer

[Kurt Bonatz]

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

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[mlorenzana (mlorenzana)]

I am able to view the device in Sound Settings, but when it attempts to play any audio, it crashes immediately. In my case I am behind a KVM, but my Windows device and my Ubuntu 18.04 server work perfectly, only my 20.04 desktop crashes.

[Hui Wang (hui.wang)]

Looks like it is a kernel driver's problem.

Could you install the 18.04's kernel under 20.04 to test?

[Ryan Nunes (rynunes)]

Just a heads up.. Noticed this post digging into the same exact syptoms with a schiit hel on arch linux. (5.8.8 kernel). I was able to resolve the lack of audio by installing and using pulsemixer. Using pulsemixer if you hit f3 (cards) and set the audio source from off to digital stereo duplex it should prevent alsa crashing and actually allow the audio source to work.

[Nikolas Carneiro (ncarneiro)]

Also have problems with Schiit Hel on Ubuntu 20.04. I've sound (both input and output) but broken pipe when selecting it from alsamnixer. Using pulsemixer to "set the audio source from off to digital stereo duplex it should prevent alsa crashing and actually allow the audio source to work" did not worked for me.

[postroutine (postroutine)]

Hello,

I got the same problem with the Schiit Audio Fulla 3 and the kernel 5.10.8 on Fedora.

But I got no problem with the Kernel 5.4.59 on Raspbian.

Kurt Bonatz reported a problem with the 5.4.0. Maybe there is a difference in audio stack between Ubuntu and Raspbian.

[Kurt Sussman (kls-2)]

Same problem, same DAC/amp. I'm using kernel 5.8.0. It worked yesterday morning before I took my laptop out of the dock for the day, but hasn't worked since. The Schiit Fulla has jacks for both mic and headphone; the mic seems fine (though I can't select it, I can see the input level in pavucontrol).

[postroutine (postroutine)]

Any news ?