On 06-02-08 15:38, Thomas Renninger wrote:

I expect on Rene's machine (might be something else, but this probably
often happens), BIOS exports dma and IO ports. The irq seem to be
missing and the driver does not use pnp_irq_valid, but pnp_irq. It

No. Please note we're talking about ISAPnP, not PnPBIOS. No BIOS involved at 
all.

Driver (sound/isa/cs423x/cs4236.c) furthermore does not use anything but the 
PnP layer itself. Start at snd_cs423x_pnpc_detect, which is the pnp .probe() 
method.

I'll look into providing a more extensive answer and/or test whatever comes 
in later.

Rene.