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Date: Mon, 26 May 2003 02:48:02 -0700
From: Terry Lambert <tlambert2@mindspring.com>
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To: Fritz Heinrichmeyer <fritz.heinrichmeyer@fernuni-hagen.de>
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Subject: Re: CMedia CMI8738 works when setting pnp-os to no
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Fritz Heinrichmeyer wrote:
> as title says, now i have to set pnp-os to "no" in my bios setup for
> sound playing to work.

Usually this indicates that there is some initialization
that's done by the BIOS that doesn't happen in the case of
"pnp-os=yes" because the hardware expects the OS's driver
to do the work.

The main thing I've seen with motherboards that behave
this way is power management: they expect the OS to turn
the power on before it tries to use the device.  Probably
the chip itself is on, and the output amp is turned off.

I mentioned this before in a similar thread; if you hack
the driver to turn the power on, it should fix this for
you.  I've seen the same thing with a USB keyboard and
mouse, on one motherboard...

-- Terry