3 replies to this topic

[dickster]

Hi There,

I am trying to get HDMI audio sorted out but I am having a frustrating time with ALSA. Video output is fine.

I prefer not to go down the Pulseaudio path just yet as i would like to get the issues resolved with ALSA first. I have a nVidia Ge Force 9500GT card with HDMI out, and am running Mythbuntu 9.04.

I believe the reason I can't get HDMI audio is that when i run aplay -l, all it sees is the onboard sound from the mobo.

Output from aplay -l is as follows:

card 0: SB [HDA ATI SB], device 0: ALC889A Analog [ALC889A Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 1: ALC889A Digital [ALC889A Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0

[/SIZE][/SIZE]

output from lspci shows the card -

01:00.0 VGA compatible controller: nVidia Corporation GeForce 9500 GT (rev a1)

Alsa version is 1.0.21, nVidia driver is 190.32

I updated the nVidia driver today, but had the same issue with the 180.xx driver that was previously installed.

I assume I need to configure a .conf file somewhere, but just looking for a bit of advice

Cheers
dickster

[arkay]

Dickster,

aplay -l should show any and all detected devices so it looks like mythbuntu hasn't seen the audio side of the card at all.

2 things I can think to try are:

1. Disable the onboard audio at the bios level and run alsaconf after next boot to see if you can get it recognised.
2. Don't most HDMI capable video cards come with an spdif passthrough that allows you to connect the video cards audio direct to the motherboard ac3 out? I'm pretty sure the GTX260 I just bought had that option. You could then have the audio fed from your onboard card via the HDMI on the video card.

Cheers,

Arkay.

[dickster]

Hi Arkay,

Thanks for your help on this. My video card has a jumper that goes to spdif in. This is plugged in and should be okay. I did double check this as it would be quite easy to get the SPDIF and GND plugs around the wrong way.

I will try the BIOS setting and see what happens. I did see some posts about this, but I couldn't see how that would work. Willing to try anything now.

I will let you know how I get on.

Cheers
dickster

[dickster]

Hi Arkay,

Just for the interests of others who may have this issue I tried disabling the on-board sound in BIOS and that just killed all sound and didn't force the recognition of the GPU.

I have found some info related to the asound.conf file on the Linux Questions website that should help but I won't be able to do anything until I get home on Thursday.

I believe the problem may relate to the fact that I have changed from an ATI GPU to a nVidia card since I installed Mythbuntu.

As a last resort, I may purge ALSA and reinstall to see if it picks up the nVidia card.

Anyhoo, I will keep you posted

Cheers
dickster