Sound Audio Intermittantly Cuts Out - Ubuntu 16.04
 

My sound cuts out very frequently on my computer and I have to unplug and plug in the sound device often for it to work again. Many times it will cut out at the end of watching a youtube video and then works after unplugging and plugging back in again, but it is not limited to just watching youtube videos. I have no idea why this is happening. Can anyone help get this to not happen. Here is what dmesg is outputting related to this problem:

[239726.923600] usb 2-1.1: USB disconnect, device number 22
[239728.380428] usb 2-1.1: new full-speed USB device number 23 using ehci-pci
[239728.478155] usb 2-1.1: New USB device found, idVendor=05a7, idProduct=1020
[239728.478158] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[239728.478160] usb 2-1.1: Product: Bose USB Audio
[239728.478161] usb 2-1.1: Manufacturer: Bose Corporation
[239728.486653] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.510081] hid-generic 0003:05A7:1020.0017: hiddev0,hidraw1: USB HID v1.10 Device [Bose Corporation Bose USB Audio] on usb-0000:00:1d.0-1.1/input2
[239728.561681] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.564683] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.583268] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.586271] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.604433] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.607352] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.625230] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.628221] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.654336] usb 2-1.1: 1:1: cannot get freq at ep 0x1
[239728.657357] usb 2-1.1: 1:1: cannot get freq at ep 0x1

so it's a usb headphone thing, which basically is its own soundcard.
try these:
https://duckduckgo.com/?q=linux+Bose...annot+get+freq

also we will need info about the steup.
for starters.

I had a sound problem that might relate. I'm using KDE with phonon, pulse, alsa. The alsa desktop stuff didn't do anything. The volume control would just mute at zero but otherwise couldn't control the volume. The one for pulse in pavucontrol was fine.

In my case the problem turned out to be pulse running an idle timer. I had awful noises when it came back in when a sound started playing and a load crack when it timed out. I'm not sure if pulse has always ran like this but in my case before upgrading this wasn't a problem.

The fix was to simply comment out the idle time entry in pulse's default.pa . Maybe in your case dbus is dropping pulse when it times out. Or you have some other set up which does the same.

John
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If the above doesn't help, try booting to a Live CD of something that's not Debian based (Mageia? OpenSUSE?) and test. If the problem occurs with the Live CD, it is a likely hardware.

Just to update adding the following to the GRUB_CMDLINE_LINUX_DEFAULT options, in /etc/default/grub fixed this for me.