[pulseaudio-tickets] [Bug 84585] Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84585

--- Comment #56 from Alessandro Ferri <alessandroferri_015 at fastwebnet.it> ---
Hi Reymond, 
I have attached two reports. The first run with the Kernel 3.12.25+ and the
second with the Kernel 3.12.29+. I can summarize to you that the behavior is
the same with both kernel without exception: up to a buffer_size of 1024, there
are no underrun, with lower buffer_size start underrun more and more frequent.
I want to specify that the song played has the following codecs:
Desperado.wav codec=uncompressed-integer Bitrate(kb/s)=512

(In reply to Alessandro Ferri from comment #55)
> Created attachment 107897 [details]
> Report of aplay -v -D hw:0,0 --buffer-size=4096 stereo.wav with Kernel
> 3.12.29+
> 
> outcome prompted with: 
> aplay -v -D hw:0,0 --buffer-size=4096 Desperado.wav
> for buffer size 4096, 2048, 1024, 512, 256, 128, 64,...
> 
> with the kernel:Kernel 3.12.29

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