ICH5, REAR2LINE and SPREAD

[carp]

Hey folks,

I'm trying to configure my ICH5 soundcard to get my surround(ish) sound speaker layout working. I'd like to have my sound on 4 speakers. The following command doesn't do anything though:

/usr/bin/ossmix mixext.rear2linejack ON
/usr/bin/ossmix mixext.spkmode SPREAD

(the values are set properly, but still no output on the line jack)

Is this a known bug, am I missing something or does my sound software need special treatment?

Thanks for your support.

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My /usr/lib/oss/logs/soundon.log
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Open Sound System starting Sun Feb 4 14:16:21 CET 2007
OSS version: 4.0rc2 (build 179/200612272036)
Kernel version: FreeBSD turgon 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Tue Jan 16 21:13:56 CET 2007 root@turgon:/usr
/obj/usr/src/sys/TURGON i386
+++ ossinfo -v3 +++
Version info: OSS 4.0rc2 (build 179/200612272036) (0x00040001)

Number of audio devices: 14
Number of audio engines: 0
Number of MIDI devices: 0
Number of mixer devices: 2


Device objects
0: ich0 Intel ICH5 (24D5)
1: softoss0 OSS Virtual Mixer v3.0

MIDI devices (/dev/midi*)

Mixer devices (/dev/mixer*)
0: ICH AC97 Mixer (ALC850) (Mixer 0 of device object 0)
Device file /dev/oss/ich0/mix0, Legacy device /dev/mixer0
Priority: 10
Caps:
Device handle: OSS-PCI-mx01
Device priority: 10

1: Virtual Mixer (Mixer 0 of device object 1)
Device file /dev/oss/softoss0/mix0, Legacy device /dev/mixer1
Priority: 1