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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84585#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84585">bug 84585</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre> 1.215| 0.000) I: [pulseaudio] alsa-util.c: cannot disable ALSA period
wakeups
( 1.216| 0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 2972
ms
( 1.217| 0.001) I: [pulseaudio] (alsa-lib)pcm_hw.c:
SNDRV_PCM_IOCTL_HW_PARAMS failed (-22)
( 1.219| 0.001) D: [pulseaudio] alsa-util.c: Set buffer size first (to
88200 samples), period size second (to 88200 samples).
( 1.220| 0.001) I: [pulseaudio] alsa-util.c: ALSA period wakeups were not
disabled
( 1.221| 0.000) I: [pulseaudio] alsa-sink.c: Successfully opened device
front:0.
( 1.221| 0.000) I: [pulseaudio] alsa-sink.c: Selected mapping 'Analog
Stereo' (analog-stereo).
( 1.222| 0.000) I: [pulseaudio] alsa-sink.c: Successfully enabled mmap()
mode.
( 1.222| 0.000) I: [pulseaudio] alsa-sink.c: Successfully enabled
timer-based scheduling mode.
can the sound card report dma residue?
pulseaudio seem ignore
1.217| 0.001) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS
failed (-22)
seem enable timer scheduling when sound card cannot disable period wakeup?</pre>
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