CMedia CMI8738 works when setting pnp-os to no

[Terry Lambert]

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