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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#c28">Comment # 28</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>Both commands produce underruns at large, audible and visible in the output.
<span class="quote">> aplay -D hw:0,0 -v --buffer-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 : 192
period_size : 32
period_time : 725
tstamp_mode : NONE
period_step : 1
avail_min : 32
period_event : 0
start_threshold : 192
stop_threshold : 192
silence_threshold: 0
silence_size : 0
boundary : 6917529027641081856
appl_ptr : 0
hw_ptr : 0
underrun!!! (at least 4.191 ms long)
Status:
state : XRUN
trigger_time: 3336.7694317
tstamp : 3336.11882117
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 1.832 ms long)
Status:
state : XRUN
trigger_time: 3336.30152303
tstamp : 3336.31983077
delay : 0
avail : 194
avail_max : 194
underrun!!! (at least 0.312 ms long)
Status:
state : XRUN
trigger_time: 3337.6068547
tstamp : 3337.6379149
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 4.293 ms long)
Status:
state : XRUN
trigger_time: 3339.4484089
tstamp : 3339.8775797
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 11.592 ms long)
Status:
state : XRUN
trigger_time: 3343.6272217
tstamp : 3343.17862683
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 2.310 ms long)
Status:
state : XRUN
trigger_time: 3343.700965780
tstamp : 3343.703274524
delay : 0
avail : 200
avail_max : 200
^CAborted by signal Interrupt...
<span class="quote">> aplay -D hw:0,0 -v --period-time=2000 --buffer-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 : 192
period_size : 96
period_time : 2176
tstamp_mode : NONE
period_step : 1
avail_min : 96
period_event : 0
start_threshold : 192
stop_threshold : 192
silence_threshold: 0
silence_size : 0
boundary : 6917529027641081856
appl_ptr : 0
hw_ptr : 0
underrun!!! (at least 8.673 ms long)
Status:
state : XRUN
trigger_time: 3355.4367755
tstamp : 3355.13037189
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 2.189 ms long)
Status:
state : XRUN
trigger_time: 3356.24657841
tstamp : 3356.26845873
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 2.160 ms long)
Status:
state : XRUN
trigger_time: 3358.690871062
tstamp : 3358.693029225
delay : 0
avail : 281
avail_max : 281
underrun!!! (at least 3.647 ms long)
Status:
state : XRUN
trigger_time: 3360.9384022
tstamp : 3360.13029349
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 1.095 ms long)
Status:
state : XRUN
trigger_time: 3361.11945732
tstamp : 3361.13039182
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 3.016 ms long)
Status:
state : XRUN
trigger_time: 3361.132006217
tstamp : 3361.135020659
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 0.352 ms long)
Status:
state : XRUN
trigger_time: 3361.465478201
tstamp : 3361.465829023
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 2.799 ms long)
Status:
state : XRUN
trigger_time: 3361.502227029
tstamp : 3361.505024503
delay : 0
avail : 200
avail_max : 200
underrun!!! (at least 0.019 ms long)
Status:
state : XRUN
trigger_time: 3361.513310022
tstamp : 3361.513327710
delay : 0
avail : 200
avail_max : 200
^CAborted by signal Interrupt...
Also, after I do:
echo 1 > /proc/asound/card0/pcm0p/xrun_debug
I have lots of this in dmesg:
[ 3504.140844] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=56,
new_hw_ptr=809, old_hw_ptr=753)
[ 3504.143264] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=913, old_hw_ptr=841)
[ 3504.148353] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=1137, old_hw_ptr=1065)
[ 3504.150102] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=1217, old_hw_ptr=1137)
[ 3504.156337] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=1489, old_hw_ptr=1417)
[ 3504.157990] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=1561, old_hw_ptr=1489)
[ 3504.169408] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=2065, old_hw_ptr=1993)
[ 3504.170967] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=2137, old_hw_ptr=2065)
[ 3504.179684] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=2521, old_hw_ptr=2449)
[ 3504.194902] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=121, old_hw_ptr=41)</pre>
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