Distorted sound on Raspberry Pi 2

[Emmanuel Vadot]

 Hi Sylvain,

 I don't have a RPI2 so I won't be really useful here but can you test the oldest available snapshot please ?

 Thanks,

On Sat, 9 Apr 2016 17:02:14 +0200
Sylvain Garrigues <sylvain at sylvaingarrigues.com> wrote:

> Take for instance the latest snapshot:
> http://ftp.freebsd.org/pub/FreeBSD/snapshots/arm/armv6/ISO-IMAGES/11.0/FreeBSD-11.0-CURRENT-arm-armv6-RPI2-20160408-r297692.img.xz
> 
> All the pcm0 warnings display continuously when playing any sound.
> 
> Should I file a bug?
> 
>  
> 
> > Le 9 avr. 2016 à 11:06, Svatopluk Kraus <onwahe at gmail.com> a écrit :
> > 
> > Is it recent problem? If yes, some info about kernel version would be
> > really nice.
> > 
> > 
> > 
> > On Fri, Apr 8, 2016 at 5:28 PM, Sylvain Garrigues
> > <sylvain at sylvaingarrigues.com> wrote:
> >> Hello,
> >> 
> >> I have continuous warnings on my Raspberry PI 2 regarding sound when hw.snd.verbose=4:
> >> 
> >> ...
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=120000, old=120000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=124000, old=124000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=0, old=0 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=4000, old=4000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=8000, old=8000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=12000, old=12000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=16000, old=16000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=16000, old=16000 delta=0 amt=0 ready=8192 free=119808
> >> pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=20000, old=20000 delta=0 amt=0 ready=8192 free=119808
> >> ?
> >> 
> >> The sound is frequently slightly distorted (like every 5s), and I am trying to figure out why.
> >> 
> >> To reproduce:
> >> # sysctl dev.pcm.0.dest=1
> >> # sysctl  hw.snd.verbose=4
> >> # mpg123 anympegfile
> >> 
> >> I still get the warnings on the HDMI output (dev.pcm.0.dest=2) but the sound is not distorted.
> >> 
> >> Any idea?
> >> 
> >> Best,
> >> Sylvain.
> >> _______________________________________________
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-- 
Emmanuel Vadot <manu at bidouilliste.com>