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Old 09-07-11, 08:52 PM   #1
tomhorsley
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Join Date: Jun 2007
Posts: 3
Default HDMI audio eradicates other sound devices?

My motherboard has a CK804 native audio system that works perfectly when I use the
nouveau driver for my GeForce GT 430 (but, of course, I only get 2D graphics).

When I install the nvidia binary drivers (from rpmfusion.org for fedora 15 64 bit), the HDMI audio
support seems to take over and won't let go. No amount of tinkering with pulseaudio settings
seems to generate a peep from the CK804.

Finally, I found the gimmick for editing the EDID info from my TV and telling the nvidia driver that
my TV has no HDMI support (which it doesn't, because I'm using a DVI->HDMI cable which
doesn't pass the audio - I don't think it does, anyway).

When I do that, everything is finally OK.

Is completely disabling the CK804 really supposed to be a side effect of initializing HDMI audio?
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Old 09-07-11, 09:02 PM   #2
Deanjo
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Posts: 301
Default Re: HDMI audio eradicates other sound devices?

It shouldn't. I have several HDMI capable cards, hooked up via HDMI and add in cards and the motherboard audio continue to work. Not using pulse here however, just pure alsa in openSUSE.

What does aplay -l list for found devices?
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Old 09-08-11, 05:47 AM   #3
tomhorsley
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Join Date: Jun 2007
Posts: 3
Default Re: HDMI audio eradicates other sound devices?

Both sound systems seem to show up all the time as far as the tools go, I just never hear any sound
via the CK804 any more. Here's the current aplay output (but I'm booted with the special EDID at the
moment, don't know if that changes things):

zooty> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: CK804 [NVidia CK804], device 0: Intel ICH [NVidia CK804]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: CK804 [NVidia CK804], device 2: Intel ICH - IEC958 [NVidia CK804 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0

Thinking about this though, maybe I should plug in some separate speakers. Perhaps the problem is the
same as the one that the EDID gimmick was invented for - somehow the TV itself thinks it is getting
HDMI audio and no longer is willing to play the analog audio sound (but I couldn't get any sound through
the DVI->HDMI cable either :-).
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