have an asus xonar dx soundcard here. have been trying for a week to get it to work in 64-bit gentoo. alsa is installed. everything is unmuted. mp3 runs in mplayer but no sound. has anyone got this sound card working on a 64-bit installation?? using the virtuoso driver. also tried oxygen driver but no success. any input on this matter would be greatly appreciated. i can supply the output of alsainfo and aadebug if anyone wants them. i am using 2.6.26-gentoo and the output of lspci is as follows:

lspci
00:00.0 Host bridge: Intel Corporation Device 4001 (rev 20)
00:01.0 PCI bridge: Intel Corporation PCI Express Port 1 (rev 20)
00:05.0 PCI bridge: Intel Corporation PCI Express Port 5 (rev 20)
00:09.0 PCI bridge: Intel Corporation PCI Express Port 9 (rev 20)
00:10.0 Host bridge: Intel Corporation FSB Registers (rev 20)
00:10.1 Host bridge: Intel Corporation FSB Registers (rev 20)
00:10.2 Host bridge: Intel Corporation FSB Registers (rev 20)
00:10.3 Host bridge: Intel Corporation FSB Registers (rev 20)
00:10.4 Host bridge: Intel Corporation FSB Registers (rev 20)
00:11.0 Host bridge: Intel Corporation Device 4031 (rev 20)
00:15.0 Host bridge: Intel Corporation FBD Registers (rev 20)
00:15.1 Host bridge: Intel Corporation FBD Registers (rev 20)
00:16.0 Host bridge: Intel Corporation FBD Registers (rev 20)
00:16.1 Host bridge: Intel Corporation FBD Registers (rev 20)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express Root Port 1 (rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #3 (rev 09)
00:1d.3 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #4 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI USB2 Controller (rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC Interface Controller (rev 09)
00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller (rev 09)
00:1f.2 IDE interface: Intel Corporation 631xESB/632xESB/3100 Chipset SATA IDE Controller (rev 09)
00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller (rev 09)
01:00.0 VGA compatible controller: nVidia Corporation G80 [GeForce 8800 GTX] (rev a2)
05:00.0 PCI bridge: PLX Technology, Inc. Device 8112 (rev aa)
06:04.0 Multimedia audio controller: C-Media Electronics Inc Device 8788
09:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port (rev 01)
09:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X Bridge (rev 01)
0a:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E1 (rev 01)
0a:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E3 (rev 01)
0f:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01)
0f:00.1 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01)
20:03.0 VGA compatible controller: XGI Technology Inc. (eXtreme Graphics Innovation) Volari Z7

So, you mean not even with the oxygen driver as mentioned here something happens?
What I would to is first of all to see which messages are displayed in /var/log/messages when I do a modprobe of snd-oxygen.

this is what i get in /var/log/messages when i modprobe for snd-virtuoso:

Aug 13 11:46:20 odysseus ACPI: PCI interrupt for device 0000:06:04.0 disabled
Aug 13 11:46:33 odysseus ACPI: PCI Interrupt 0000:06:04.0[A] -> GSI 16 (level, low) -> IRQ 16

will have to recompile the kernel for snd-oxygen and will get back to you.

modprobe snd-oxygen produces nothing in /var/log/messages.

Well, usually no news is good news !
And I personally had a C-Media some time ago and it was the easiest card to configure under Linux I ever had.

So, after that you do modprobe snd-oxygen, what does alsaconf tell you when you start it up? Does it see your card? Can it configure it successfully?

AND, SORRY, I JUST HAD A FLASHBACK: btw now I remember that "everything unmuted" is not always a good idea. E.g. on one of my PCs, if I unmute some of the surround channels (ok, not a C-Media chip, but the behaviour could be similar) the sound coming out from the main out-connector sounds like being in deep space - not a single beep.
So, you should try as well a lot of possible combinations while you play something using mplayer - e.g. everything muted excluding the master and PCM. Really, try this out, if alsaconf recognizes your soundcard - that should mean that the driver/module you're using is the correct one.

alsaconf sees the card using oxygen but when it tries to configure it i get a machine check exception error. i am also getting machine check exception errors when i try to turn up the volume using alsamixer or amixer with virtuoso. i assume this must mean i have a bad card??

pffff.... . Bad bad card!
Well, if I would be you I would jump into the car, go to the next IT-shop and buy another card. Do you have any special requirements, like e.g. optical digital out?

no special requirements although i want a nice card as i have good headphones and listen to alot of music.

Well, connecting good headphones to the PC might already be a mistake, or? I think I got the best sound from a PC with an "old" (2 years old) MSI mainboard, with the "Spread spectrum" option switched on.
But anyway you'll have to be lucky to get a card 1) which is supported under Linux (actually not difficult - I think your case is an exception) and which delivers a nice sound. I read posts some time ago stating that some cards with C-Media chips were generating a lot of interference, even under Windows, so you should perhaps try to avoid them - but of course, in the shop you cannot open the box to read what's written on the soundcard's chips. If I would be you I would try to go for the oldest Soundblaster card I can find in the shop.
And by the way, to listen to your songs you could use Amarok, having an active last.fm setting - very very nice.

try newer drivers, i know its kinda late to talk about it, but it works for me. I only installed it today. Installing latest alsa version will probably help.

I am on gentoo amd64 SMP myself.

too late i threw it away and got a asus xonar dx-2. it just works.

Well, i kinda felt that you would say so.

It was not my purpose to help you, rather i wanted to point to other linux users out there, there is a product that is working on PCIE bus and has good working drivers on linux. i searched for this device for a week or so. i fealt bad for not sharing with anyone else.