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=3D4: ... pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D120000, = old=3D120000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D124000, = old=3D124000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D0, = old=3D0 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D4000, = old=3D4000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D8000, = old=3D8000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D12000, = old=3D12000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D16000, = old=3D16000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D16000, = old=3D16000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 pcm0: WARNING: PCMDIR_PLAY DMA completion too fast/slow ! hwptr=3D20000, = old=3D20000 delta=3D0 amt=3D0 ready=3D8192 free=3D119808 =E2=80=A6 The sound is frequently slightly distorted (like every 5s), and I am = trying to figure out why. To reproduce: # sysctl dev.pcm.0.dest=3D1 # sysctl hw.snd.verbose=3D4 # mpg123 anympegfile I still get the warnings on the HDMI output (dev.pcm.0.dest=3D2) but the = sound is not distorted. Any idea? Best, Sylvain.=
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