I'm sorry I was wrong.
if_sk.c with SK_DEBUG defined works, but without that, it doesn't.

From: "Shin'ichiro TAYA" <taya@ba2.so-net.ne.jp>
Subject: Re: sk on ASUS K8V SE Delux
Date: Sun, 24 Oct 2004 20:10:11 +0900 (JST)

> From: Manuel Bouyer <bouyer@antioche.eu.org>
> Subject: Re: sk on ASUS K8V SE Delux
> Date: Wed, 6 Oct 2004 21:06:04 +0200
> 
> > On Wed, Oct 06, 2004 at 01:21:44AM +0900, Shin'ichiro TAYA wrote:
> > > 
> > > 2)Running kernel GENERIC, sk0 doesn't work unless ifconfig sk0 down and up.
> > > Does anybody experience this problem?
> > 
> > Yes, known problem. Can you try a recent current kernel and see if it helps ?
> > There have been commits to the sk driver recently.
> 
> It works fine now!
> Thank you!
> Next, I want to see pdcide(PDC20378) working. :-)
> 
> Regards,
> taya