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Old 07-11-10, 01:03 AM   #1
dimm0k
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Join Date: Mar 2004
Posts: 5
Default no audio through HDMI in Linux

I have Slackware 13.1 running on a Lenovo W510 with an nVidia Quadro FX 880M and am trying to get audio output through the Displayport -> HDMI interface in Linux. In Windows 7, this works fine so hardware wise things are set up properly.

I also am running kernel 2.6.34.1 with ALSA 1.0.23. aplay looks to properly detect the HDMI audio out as the following:

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0

Whenever I play audio, it is coming out of the notebook's speakers rather than the speakers connected to the monitor; speakers are actually part of the monitor. In KDE's system settings for multimedia, there's a test option for output devices. The one for HDA Intel works fine and plays through the notebook's speakers. Running the test for the HDA NVidia yields no sound whatsoever. I feel like I am missing something... any suggestions?
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Old 07-13-10, 07:21 PM   #2
SirLudicrus
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Join Date: Jul 2010
Posts: 2
Default Re: no audio through HDMI in Linux

I had the same problem and the 256.xx beta driver fixed things for me as well as upgrading to ALSA 1.0.23. I'm not saying that will fix it, but it's probably worth a try. I also had to turn on the cryptic looking 'SPDIF 1' output in alsamixer (turns out that is actually the HDMI interface.) Hope that helps!
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Old 07-15-10, 02:59 PM   #3
lintweaker
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Join Date: Oct 2004
Posts: 44
Question Re: no audio through HDMI in Linux

Which beta of the 256 series are you referring to?
I am trying to get sound working from the HDMI port of my 2010 mac mini (MCP89) to no avail. aplay -l does list several HDMI interfaces but no sound.

dmesg reveals that no connection is detected on the HDMI:

Code:
HDMI hot plug event: Pin=5 Presence_Detect=1 ELD_Valid=0
HDMI hot plug event: Pin=5 Presence_Detect=0 ELD_Valid=1
On another system with a GT220 I see:

Code:
HDMI hot plug event: Pin=5 Presence_Detect=1 ELD_Valid=0
HDMI hot plug event: Pin=5 Presence_Detect=1 ELD_Valid=1
HDMI: detected monitor RX-V1065
    at connection type HDMI
What do you get?

Last edited by lintweaker; 07-15-10 at 03:00 PM. Reason: quote instead of code
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