I have this in the /boot/grub/menu.lst and it doesn't display any error at restart.
title Debian GNU/Linux, kernel 2.6.27.4
root (hd0,0)
kernel /boot/vmlinuz-2.6.27.4 root=/dev/hda1 hfcmulti.dslot=1 ro quiet
initrd /boot/initrd.img-2.6.27.4
did you load hfcmulti.ko with dslot=1 parameter? this is required to move dchannel slot from 16 to 1.> Mon May 25 16:07:39 2009 <1000> input/misdn.c:125 alen =6, dev(0) channel(0) sapi(63) tei(127)
> Mon May 25 16:07:39 2009 <1000> input/misdn.c:128 <= len = 12, prim(0x8) id(0x7f3f): DL_INFORMATION_IND
> Mon May 25 16:07:39 2009 <1000> input/misdn.c:135 DL_INFORMATION_IND: use channel(0) sapi(63) tei(127) for now> ISDN message for unknown sign_link
>