Chaintech AV710

[Russ Pridemore <russ.pridemore@comcast.net>]

Hello.  I have a Chaintech AV710 (Envy24HT) card in an Athlon64 system
running Gentoo Linux.  I am attempting to configure it to output sound
to my stereo through its S/PDIF optical jack.  Stereo sound appears to
be working (with xmms) if I connect line-out to my stereo, but hooking
up digital, speaker-test -c6 produces nothing.  Neither does xmms.
Running speaker-test -c6 through line-out worked, but only stereo, of
course.  How do I get surround-sound working, specifically ac3
passthrough for mplayer, etc.?

The only thing I see in the system log is this:
 ACPI: PCI interrupt 0000:00:09.0[A] -> GSI 17 (level, low) -> IRQ 169
 ice1724: Invalid EEPROM version 1

Interrupt 169 is the sound card:
$ cat /proc/asound/cards
0 [AUDIO2000      ]: ICE1724 - AMP Ltd AUDIO2000
                     AMP Ltd AUDIO2000 at 0x9000, irq 169


Thanks,
Russ



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