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[Boyan Sotirov <lz1dsb@xxxxxx>]

I think I'm affected by a similar issue. In my case i use USB audio speakers. Each time I select them as an output device - yes they work, but constantly the following messages are logged:
Jul  9 14:42:04 NUC-desktop kernel: [ 3413.003020] retire_playback_urb: 820 callbacks suppressed
Jul  9 14:42:09 NUC-desktop kernel: [ 3418.018277] retire_playback_urb: 827 callbacks suppressed
Jul  9 14:42:14 NUC-desktop kernel: [ 3423.033500] retire_playback_urb: 827 callbacks suppressed
Jul  9 14:42:19 NUC-desktop kernel: [ 3428.048798] retire_playback_urb: 827 callbacks suppressed
Jul  9 14:42:24 NUC-desktop kernel: [ 3433.064025] retire_playback_urb: 827 callbacks suppressed

Should it be like that? What's the meaning of the these log messages?

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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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