First off, I apologize if I'm reporting this bug to the wrong list or in the wrong manner; I have never done this before. I've got a Skylake system (kernel 4.3.3-2-ARCH) using Pulseaudio and ALSA which uses a FiiO E10k Olympus 2 (external DAC/AMP) as the soundcard. Very seldom the system will fall to it's knees and ultimately hang, requiring a hard reboot. Checking the system logs gives an error and a dump from alsa-util.c, which is attached to this mail. I'm unsure if there is anymore info that you would need. If more is required, please, do ask.
Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_avail() returned a value that is exceptionally large: 11328 bytes (59 ms). Jan 14 18:17:10 den pulseaudio[6298]: 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 developers. Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_dump(): Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: Hardware PCM card 0 'DigiHug USB Audio' device 0 subdevice 0 Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: Its setup is: Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: stream : PLAYBACK Jan 14 18:17:10 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: access : MMAP_INTERLEAVED Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: format : S16_LE Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: subformat : STD Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: channels : 2 Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: rate : 48000 Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: exact rate : 48000 (48000/1) Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: msbits : 16 Jan 14 18:17:11 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: buffer_size : 440 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_size : 88 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_time : 1833 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_mode : ENABLE Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_type : MONOTONIC Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_step : 1 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: avail_min : 88 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_event : 1 Jan 14 18:17:12 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: start_threshold : -1 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: stop_threshold : 7926335344172072960 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: silence_threshold: 0 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: silence_size : 0 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: boundary : 7926335344172072960 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: appl_ptr : 309131528 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: hw_ptr : 309134448 Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_delay() returned a value that is exceptionally large: -14656 bytes (-76 ms). Jan 14 18:17:13 den pulseaudio[6298]: 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 developers. Jan 14 18:17:13 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_dump(): Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: Hardware PCM card 0 'DigiHug USB Audio' device 0 subdevice 0 Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: Its setup is: Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: stream : PLAYBACK Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: access : MMAP_INTERLEAVED Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: format : S16_LE Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: subformat : STD Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: channels : 2 Jan 14 18:17:14 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: rate : 48000 Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: exact rate : 48000 (48000/1) Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: msbits : 16 Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: buffer_size : 440 Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_size : 88 Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_time : 1833 Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_mode : ENABLE Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: tstamp_type : MONOTONIC Jan 14 18:17:15 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_step : 1 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: avail_min : 88 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: period_event : 1 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: start_threshold : -1 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: stop_threshold : 7926335344172072960 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: silence_threshold: 0 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: silence_size : 0 Jan 14 18:17:16 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: boundary : 7926335344172072960 Jan 14 18:17:17 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: appl_ptr : 309185120 Jan 14 18:17:17 den pulseaudio[6298]: E: [alsa-sink-USB Audio] alsa-util.c: hw_ptr : 309191472
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