[pulseaudio-tickets] [Bug 49608] periodic audio skips with Intel HDA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49608

--- Comment #29 from rkfg <rkfg at rkfg.me> ---
I've found that 16000 buffer time with 4000 period time doesn't underrun while
if I change the period time to 1000 or 2000 it underruns pretty quickly. Lower
buffer times underrun regardless of the period time it seems.

16000/4000 shows these params:

> aplay -D hw:0,0 -v  --buffer-time=16000 --period-time=4000 /tmp/fr025.wav
Playing WAVE '/tmp/fr025.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
Hardware PCM card 0 'HDA Intel PCH' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 768
  period_size  : 192
  period_time  : 4353
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 192
  period_event : 0
  start_threshold  : 768
  stop_threshold   : 768
  silence_threshold: 0
  silence_size : 0
  boundary     : 6917529027641081856
  appl_ptr     : 0
  hw_ptr       : 0

16000/2000 is like this:

> aplay -D hw:0,0 -v  --buffer-time=16000 --period-time=2000 /tmp/fr025.wav
Playing WAVE '/tmp/fr025.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
Hardware PCM card 0 'HDA Intel PCH' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 672
  period_size  : 96
  period_time  : 2176
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 96
  period_event : 0
  start_threshold  : 672
  stop_threshold   : 672
  silence_threshold: 0
  silence_size : 0
  boundary     : 6052837899185946624
  appl_ptr     : 0
  hw_ptr       : 0
underrun!!! (at least 2.587 ms long)
Status:
  state       : XRUN
  trigger_time: 4380.16449247
  tstamp      : 4380.19033473
  delay       : 0
  avail       : 761
  avail_max   : 761
^CAborted by signal Interrupt...

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