Re: pcm0 playing too fast.

From: Kevin Oberman <>
Date: Thu, 25 Sep 2003 17:00:00 -0700
> From: David Gilbert <>
> Date: Wed, 24 Sep 2003 22:57:36 -0400
> Sender:
> It's my perception that some recent current (and I'm not positive
> when) has made a change that is causing the pcm device to play sounds
> a tone or so too fast.  The device probs in the kernel as:
> pcm0: <Intel ICH4 (82801DB)> port 0xbc40-0xbc7f,0xb800-0xb8ff mem 0xf4fff400-0xf4fff4ff,0xf4fff800-0xf4fff9ff irq 11 at device 31.5 on pci0
> pcm0: <SigmaTel STAC9750/51 AC97 Codec>
> and it definately didn't have this behaviour in 5.1-RELEASE.

Does it do this all the time or only after the system has been
suspended and resumed? If so, take a look at I know Orion has
looked at it, but I don't know when he might have a fix for it.

You might check the value of hw.snd.pcm0.ac97rate. If it is not 48000,
try setting it to that value.
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail:			Phone: +1 510 486-8634
Received on Thu Sep 25 2003 - 15:00:05 UTC

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