Bug#880050: No Display port audio with Nvidia driver 375.82

[Luca Boccassi]

Control: forwarded -1 https://devtalk.nvidia.com/default/topic/1019761/linux/no-sound-using-displayport-audio-with-375-82-384-59-and-384-69/
Control: tags -1 upstream

On Sat, 2017-10-28 at 20:25 -0400, Chris Elmes wrote:
> Package: nvidia-driver
> Version: 375.82-1~deb9u1
> Severity: important
> 
> Hello,
> 
> Display port audio stops working after upgrading to version: 375.82,
> was
> working on older version: 375.66
> 
> Debian stretch 4.9.0-4-amd64 #1 SMP Debian 4.9.51-1 (2017-09-28)
> 
> Nvidia Quadro k5200
> 
> Some more information found on Nvidia Dev talk site:
> 
> https://devtalk.nvidia.com/default/topic/1019761/linux/no-sound-using
> -displayport-audio-with-375-82-384-59-and-384-69/
> 
> From kernel log:
> snd_hda_codec_hdmi hdaudioC0D0: invalid ELD data byte 0
> 
> Same output:
>  monitor_present 0
>  eld_valid 0
> from:
>  cat /proc/asound/card0/eld#0.*
> As on Nvidia Dev talk link.

Thanks for the report, as you noted in the pasted link it's an upstream
problem, so not much we can do until they fix it.

Kind regards,
Luca Boccassi
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