This USB headset doesn't seem to support sample rate polling, similar to this issue:
https://bugzilla.kernel.org/show_bug.cgi?id=95961
== The problem ==
Every time something goes to interact with the device (playing a sound file, opening the sound panel, opening web audio/video), a 10 second pause is encountered, where dmesg prints out two messages:
usb 2-1.2: 2:1: cannot get freq at ep 0x83
usb 2-1.2: 2:1: cannot get freq at ep 0x83
Once the sound is playing, everything is fine. These sample rate polls don't seem to keep happening. After waiting for maybe 30 seconds after sound is playing, future interactions will again trigger the pause.
This 10 second pause can introduce other subtle problems. For instance, google hangouts will sometimes timeout waiting for the sound device to respond, and the browser tab will crash or not fully load as a result. The sound panel often also will not display the device in the list of choices, and you will have to close it out. Sometimes restart pulse audio to get it to recognize the headset again.
== The solution ==
It is simple, add this USB ID to the sound/usb/quirks.c:snd_usb_get_sample_rate_quirk function.
case USB_ID(0x1395, 0x740a): /* Sennheiser Officerunner */
version signature: Ubuntu 4.4.0-36.55-generic 4.4.16
# lsusb |grep Senn
Bus 002 Device 004: ID 1395:740a Sennheiser Communications
# zcat /var/log/kern.log.2.gz | grep 'cannot get' | tail -4
Sep 2 11:26:56 helo kernel: [908040.937098] usb 2-1.2: 2:1: cannot get freq at ep 0x4
Sep 2 11:27:01 helo kernel: [908045.941168] usb 2-1.2: 2:1: cannot get freq at ep 0x4
Sep 2 12:18:44 helo kernel: [911149.006318] usb 2-1.2: 3:1: cannot get freq at ep 0x83
Sep 2 12:18:49 helo kernel: [911154.010268] usb 2-1.2: 3:1: cannot get freq at ep 0x83
---
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC3: dpb 12893 F.... pulseaudio
/dev/snd/controlC2: dpb 12893 F.... pulseaudio
/dev/snd/controlC1: dpb 12893 F.... pulseaudio
/dev/snd/controlC0: dpb 12893 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=a9a39ff3-c97d-471e-a0b3-518b4db8685c
InstallationDate: Installed on 2015-03-18 (544 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150306)
MachineType: Hewlett-Packard HP Z620 Workstation
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia zfs zunicode zcommon znvpair zavl
Package: linux (not installed)
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic.efi.signed root=/dev/mapper/vgroot-lvroot ro console=tty0 console=ttyS4,115200 nosplash nomdmonddf nomdmonisw
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
RelatedPackageVersions:
linux-restricted-modules-4.4.0-36-generic N/A
linux-backports-modules-4.4.0-36-generic N/A
linux-firmware 1.157.3
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Tags: xenial
Uname: Linux 4.4.0-36-generic x86_64
UpgradeStatus: Upgraded to xenial on 2016-02-16 (210 days ago)
UserGroups: adm cdrom dip docker libvirtd lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 05/27/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: J61 v03.88
dmi.board.asset.tag: 2UA41528ZC
dmi.board.name: 158A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 0.00
dmi.chassis.asset.tag: 2UA41528ZC
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrJ61v03.88:bd05/27/2015:svnHewlett-Packard:pnHPZ620Workstation:pvr:rvnHewlett-Packard:rn158A:rvr0.00:cvnHewlett-Packard:ct6:cvr:
dmi.product.name: HP Z620 Workstation
dmi.sys.vendor: Hewlett-Packard
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1622763
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.