Date: Fri, 8 Apr 2016 17:28:36 +0200 From: Sylvain Garrigues <sylvain@sylvaingarrigues.com> To: freebsd-arm <freebsd-arm@freebsd.org> Subject: Distorted sound on Raspberry Pi 2 Message-ID: <FA4A06C6-0A9A-4697-8C2D-141E1416F252@sylvaingarrigues.com>
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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.help
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