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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#c67">Comment # 67</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:alessandroferri_015@fastwebnet.it" title="Alessandro Ferri <alessandroferri_015@fastwebnet.it>"> <span class="fn">Alessandro Ferri</span></a>
</span></b>
<pre>I do not know if the bug is related to the kernel or pulseaudio or another. In
relation to this, I expect a reply from HiFiBerry. I was counting on you to
know where is the issue.
For you, where is the bug? and how can I fix it.
(In reply to Raymond from <a href="show_bug.cgi?id=84585#c66">comment #66</a>)
<span class="quote">> if you think the bug is related to kernel
>
> you need to check whether hwptr is correct on period update
>
> and report bug at
>
> <a href="https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers">https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers</a>
>
> CONFIG_SND_PCM_XRUN_DEBUG, CONFIG_SND_VERBOSE_PROCFS, CONFIG_SND_DEBUG
> options must be enabled in your kernel
>
> www.alsa-project.org/main/index.php/XRUN_Debug
>
> # Enable basic debugging and dump stack, check hardware pointer on the
> period update
> # Usefull to just see, if PCM stream is stopped for a reason (usually wrong
> audio process timing from scheduler)
> # And to check the values from driver
> echo 11 > /proc/asound/card0/pcm0p/xrun_debug</span ></pre>
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