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Thread: nVidia GTS450 - no HDMI audio

  1. #1
    Join Date
    Jan 2011

    nVidia GTS450 - no HDMI multichannel audio

    I have difficulty getting my GTS450 to transfer audio to AV receiver. I have installed the newest Nvidia driver 260.19.36, but there is still no soundcard visible "fully" (I get message in alsamixer: "This sound device does not have any controls.". I have switched off the onboard soundcard in BIOS.

    Here is my output of alsa-info script.

    EDIT: I have upgraded kernel to 2.6.38-020638rc4 then NVIDIA driver to 260.19.36 again, then followed these instructions and.... got the sound!!!!
    For now it is only stereo though.

    EDIT2: Only stereo works. Here is new alsa-info output.
    I have upgraded ALSA to the newest 1.0.24 but this solved nothing. Command:
    speaker-test -twav -c8 -Dhdmi:NVidia
    Playback device is hdmi:NVidia
    Stream parameters are 48000Hz, S16_LE, 8 channels
    WAV file(s)
    Rate set to 48000Hz (requested 48000Hz)
    Buffer size range from 16 to 4096
    Period size range from 8 to 2048
    Using max buffer size 4096
    Periods = 4
    was set period_size = 1024
    was set buffer_size = 4096
     0 - Front Left
     4 - Centre
     1 - Front Right
     7 - Side Right
     3 - Rear Right
     2 - Rear Left
     6 - Side Left
     5 - LFE
    but sound is only produced for FL and FR.

    I have read quite a lot of forum posts, faqs, howtos, etc. but most of the issues are only related to having no sound at all.

    Please, any ideas?
    Last edited by moltek; February 12th, 2011 at 05:08 PM.

  2. #2
    Join Date
    Jan 2011

    Re: nVidia GTS450 - no HDMI audio

    Still nothing despite having the best and newest Nvidia driver, Alsa and kernel. Only stereo via HDMI works

    I have just run aplay -L again getting this:
        Discard all samples (playback) or generate zero samples (capture)
        Playback/recording through the PulseAudio sound server
        HDA NVidia, HDMI 0
        HDMI Audio Output
        HDA NVidia, HDMI 0
        Direct sample mixing device
        HDA NVidia, HDMI 0
        Direct sample snooping device
        HDA NVidia, HDMI 0
        Direct hardware device without any conversions
        HDA NVidia, HDMI 0
        Hardware device with all software conversions
    It seems that "hw" is the device I need to use. How can I use it instead of "hdmi" that now seems to be used?

  3. #3
    Join Date
    Jan 2011

    Re: nVidia GTS450 - only stereo HDMI audio

    I have just seen this bug report. It seems upgrade to 2.6.38 rc5 might solve the issue

    EDIT: It did not solve the issue.
    Last edited by moltek; March 2nd, 2011 at 12:29 PM.

  4. #4
    Join Date
    Jan 2011

    Re: nVidia GTS450 - only stereo HDMI audio

    Having no luck with Mint, I decided to start from fresh Maverick install (using USB disk). Here are the steps
    - install Ubuntu 10.10 Desktop x86
    - no sound, audio does not work (aplay -l does not show any NVidia devices),
    - install 270.39 NVidia driver from ppa:ubuntu-x-swat/x-updates
    - still no sound, aplay -l does not show any audio devices (my onboard audio is switched off),
    - install alsa update from ppa:ubuntu-audio-dev/ppa
    - aplay -l shows HDA Nvidia, sound is played by sound-test (but only 2 channels, rest of them are not audible).

    ELD data is correct, showing possible 8 channels and all multichannel codecs.
    monitor_present        1
    eld_valid        1
    monitor_name        DENON-AVAMP
    connection_type        HDMI
    eld_version        [0x2] CEA-861D or below
    edid_version        [0x3] CEA-861-B, C or D
    manufacture_id        0xee11
    product_id        0x1d
    port_id            0x20000
    support_hdcp        0
    support_ai        0
    audio_sync_delay    0
    speakers        [0x5f] FL/FR LFE FC RL/RR RC RLC/RRC
    sad_count        7
    sad0_coding_type    [0x1] LPCM
    sad0_channels        8
    sad0_rates        [0x1ee0] 44100 48000 88200 176400 192000 384000
    sad0_bits        [0xe0000] 16 20 24
    sad1_coding_type    [0x7] DTS
    sad1_channels        6
    sad1_rates        [0x6c0] 48000 88200 176400 192000
    sad1_max_bitrate    1536000
    sad2_coding_type    [0x2] AC-3
    sad2_channels        6
    sad2_rates        [0xe0] 44100 48000 88200
    sad2_max_bitrate    640000
    sad3_coding_type    [0xb] DTS-HD
    sad3_channels        8
    sad3_rates        [0x1ec0] 48000 88200 176400 192000 384000
    sad4_coding_type    [0xa] E-AC-3/DD+ (Dolby Digital Plus)
    sad4_channels        8
    sad4_rates        [0xc0] 48000 88200
    sad5_coding_type    [0xc] MLP (Dolby TrueHD)
    sad5_channels        6
    sad5_rates        [0x1ec0] 48000 88200 176400 192000 384000
    sad6_coding_type    [0xc] MLP (Dolby TrueHD)
    sad6_channels        8
    sad6_rates        [0x6c0] 48000 88200 176400 192000
    Again, any comments on how to solve this? Should I simply wait for Natty and hope for the best?
    Last edited by moltek; March 11th, 2011 at 12:42 PM. Reason: added ELD

  5. #5
    Join Date
    Feb 2008
    Kubuntu 7.10 Gutsy Gibbon

    Re: nVidia GTS450 - no HDMI audio

    Did you ever solve this problem?

    I'm having the exact same problem with a Geforce 520. I'm still on Debian's 2.6.32-5 kernel (although with the newest ALSA to get the device to show up) so I thought the kernel bug you linked to (which sadly seems to have disappeared from the Internet now that got hacked) would solve it, but I guess it didn't?

    If anyone else has any useful information regarding this problem, please post.

    Edit: I solved it!

    The bug report you linked to is down but here's the patch attached to it:

    As I had previously compiled alsa-drivers 1.0.24 I just applied that patch manually and recompiled, and woila, speaker-test -D default -c6 now outputs noise on all channels. This also meant that XBMC started playing 6-channel FLAC files out of the box (where previously I got only the front channels).

    I hope this helps someone in the future!
    Last edited by negge; October 4th, 2011 at 12:49 AM.

  6. #6
    Join Date
    Jan 2011

    Re: nVidia GTS450 - no HDMI audio

    Congrats! good job.

    I was talking to myself in this thread and I forgot to put the solution in. I have solved it and posted a complete story on NvNews forums.


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