Hi devs,

I'm experiencing random hick-ups on my Carbon X1 2nd version with a Xonar U3 USB sound card plugged into the onelink dock. When this happens, the whole desktop freezes, whatever was last playing (second or two) loops and after a while (~30seconds) everything recovers..

I see this in my logs:

Mar 16 11:37:07 ksekera-arch rtkit-daemon[1207]: The canary thread is apparently starving. Taking action. Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_avail() returned a value that is exceptionally large: 4194088 bytes (23776 ms). Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA develop Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_dump(): Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Hardware PCM card 2 'USB Advanced Audio Device' device 0 subdevice 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Its setup is: Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: stream : PLAYBACK Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: access : MMAP_INTERLEAVED Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: format : S16_LE Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: subformat : STD Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: channels : 2 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: rate : 44100 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: exact rate : 44100 (44100/1) Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: msbits : 16 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: buffer_size : 88200 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_size : 44100 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_time : 1000000 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_mode : ENABLE Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_type : MONOTONIC Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_step : 1 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: avail_min : 87319 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_event : 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: start_threshold : -1 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: stop_threshold : 6206523236469964800 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: silence_threshold: 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: silence_size : 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: boundary : 6206523236469964800 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: appl_ptr : 20607492 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: hw_ptr : 21567814

Mar 16 11:37:07 ksekera-arch rtkit-daemon[1207]: Demoting known real-time threads. Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_delay() returned a value that is exceptionally large: -3674960 bytes (-20833 ms). Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA develop Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_dump(): Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Hardware PCM card 2 'USB Advanced Audio Device' device 0 subdevice 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: Its setup is: Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: stream : PLAYBACK Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: access : MMAP_INTERLEAVED Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: format : S16_LE Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: subformat : STD Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: channels : 2 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: rate : 44100 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: exact rate : 44100 (44100/1) Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: msbits : 16 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: buffer_size : 88200 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_size : 44100 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_time : 1000000 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_mode : ENABLE Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_type : MONOTONIC Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_step : 1 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: avail_min : 87319 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: period_event : 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: start_threshold : -1 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: stop_threshold : 6206523236469964800 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: silence_threshold: 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: silence_size : 0 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: boundary : 6206523236469964800 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: appl_ptr : 20653792 Mar 16 11:37:12 ksekera-arch pulseaudio[1203]: E: [alsa-sink-USB Audio] alsa-util.c: hw_ptr : 21572797 Mar 16 11:37:07 ksekera-arch rtkit-daemon[1207]: Successfully demoted thread 1203 of process 1203 (/usr/bin/pulseaudio). Mar 16 11:37:07 ksekera-arch rtkit-daemon[1207]: Demoted 1 threads.

I'm on arch linux:

ksekera@ksekera-arch ~> cat /proc/asound/version Advanced Linux Sound Architecture Driver Version k4.3.6-1-ck. ksekera@ksekera-arch ~> uname -a Linux ksekera-arch 4.3.6-1-ck #1 SMP PREEMPT Fri Feb 19 20:24:27 EST 2016 x86_64 GNU/Linux

Let me know if you need any more info,

Regards,

Klement