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[Greg Tippitt <gtippitt@xxxxxxxxxxxxx>]

I am having this same error when using a Zalman ZM-RSSC External USB 5.1
Sound adapter.  The machine is a fresh install of LUBUNTU 14.04.  Before
upgrading my HTPC, I was using this same sound adapter with another PC
running LUBUNTU 12.04 and did not get this error.  I get this error
logged whenever any application is outputing sound.  I primarily use the
PulseAudio interface from VLC and stream video from NetFlix using the
Pipelight facility with Firefox. (Super praise and thanks for everyone
that worked on getting NetFlix working so great with Ubuntu.)

I did not originaly report this bug.   I'll try posting the "apport-
collect 1333002" output that was requested and has not been provided
yet.  While sound continues to work despite this error being logged,
these repeated errors accumulate and make logs difficult to use.

My deepest thanks to all involved in Ubuntu development and maintenance,
Greg Tippitt


** Tags added: apport-collected trusty

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https://bugs.launchpad.net/bugs/1333002

Title:
  usb audio related bug

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Jun 23 00:40:03 lxf kernel: [ 2949.825841] retire_playback_urb: 827 callbacks suppressed
  Jun 23 00:40:08 lxf kernel: [ 2954.834314] retire_playback_urb: 827 callbacks suppressed
  Jun 23 00:40:13 lxf kernel: [ 2959.842780] retire_playback_urb: 827 callbacks suppressed
  Jun 23 00:40:18 lxf kernel: [ 2964.851254] retire_playback_urb: 827 callbacks suppressed
  ......... permanently

  when I unplugged my usb audio device, the messages stopped:

  Jun 23 00:44:34 lxf kernel: [ 3220.281248] retire_playback_urb: 827 callbacks suppressed
  Jun 23 00:44:37 lxf pulseaudio[2516]: [alsa-sink-USB Audio] alsa-util.c: Got POLLNVAL from ALSA
  Jun 23 00:44:37 lxf pulseaudio[2516]: [alsa-sink-USB Audio] alsa-util.c: Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): Нет такого устройства
  Jun 23 00:44:37 lxf kernel: [ 3223.249863] usb 2-1.2: USB disconnect, device number 4

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