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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - periodic audio skips with Intel HDA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=49608#c29">Comment # 29</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - periodic audio skips with Intel HDA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=49608">bug 49608</a>
from <span class="vcard"><a class="email" href="mailto:rkfg@rkfg.me" title="rkfg <rkfg@rkfg.me>"> <span class="fn">rkfg</span></a>
</span></b>
<pre>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:
<span class="quote">> aplay -D hw:0,0 -v --buffer-time=16000 --period-time=4000 /tmp/fr025.wav</span >
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:
<span class="quote">> aplay -D hw:0,0 -v --buffer-time=16000 --period-time=2000 /tmp/fr025.wav</span >
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...</pre>
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