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Full Version: Atmos / trueHD 7.1 passthrough not working. 5.1 works
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mauserrifle

2018-10-02, 14:45
Hi Smile

I have an issue with Kodi on Linux where passthrough for TrueHD / DTS-HD is not working on 7.1 videos. No audio. On 5.1 videos Atmos works (my AV confirms saying "Dolby Atmos"). On Windows passthrough works for all videos using WASAPI.
 
* Intel NUC: NUC6I7KYK
* Soundbar: Samsung HW-N950
* Debian Stretch with kernel 4.18
* Kodi 17.6
* Firmware of intel HDMI adaptar is up to date

My debug log:
https://pastebin.com/7CVxv0uA

In this log I play a 5.1 atmos demo (works). Then a 7.1 demo (does not work).

Since it all works on Windows, I guess it must be software/driver related within Linux.

Anything I can do to make it work?

Thanks!!

Cheers,
Maurice

HomerJau

2018-10-06, 23:34
The log shows the file is stereo. Can you confirm what the default audio track is please?

fritsch

2018-10-07, 08:26
From kodi pov all fine:
Code:
14:36:52.057 T:140641178740480   DEBUG: CAESinkALSA::GetChannelLayout - Input Channel Count: 8 Output Channel Count: 8
14:36:52.057 T:140641178740480   DEBUG: CAESinkALSA::GetChannelLayout - Requested Layout: RAW,RAW,RAW,RAW,RAW,RAW,RAW,RAW
14:36:52.057 T:140641178740480   DEBUG: CAESinkALSA::GetChannelLayout - Got Layout: RAW,RAW,RAW,RAW,RAW,RAW,RAW,RAW (ALSA: none)
14:36:52.057 T:140641178740480   DEBUG: CActiveAESink::OpenSink - ALSA Initialized:
14:36:52.057 T:140641178740480   DEBUG:   Output Device : HDA Intel PCH
14:36:52.057 T:140641178740480   DEBUG:   Sample Rate   : 192000
14:36:52.057 T:140641178740480   DEBUG:   Sample Format : AE_FMT_S16NE
14:36:52.058 T:140641178740480   DEBUG:   Channel Count : 8
14:36:52.058 T:140641178740480   DEBUG:   Channel Layout: RAW,RAW,RAW,RAW,RAW,RAW,RAW,RAW
14:36:52.058 T:140641178740480   DEBUG:   Frames        : 9600
14:36:52.058 T:140641178740480   DEBUG:   Frame Size    : 16

Seems you have a driver issue. Google: "Linux lspcon nuc"

mauserrifle

2018-10-11, 14:07
It is indeed a hardware/driver issue common on NUCs. For my model I cannot find any more fixes. I googled for days and tried so much.  I have given up and installed Windows. I also had the issue that my sound stops playing after some minutes, sometimes even seconds. It is totally bugged on Linux Sad The latest beta of Libreelec had some fixes for the HDMI issues on intel hardware, but the passthrough issue still remains.

fritsch

2018-10-11, 18:42
In Windows update lspcon firmware to >= 1.66 afterwards in linux use kernel 4.18, that's it.

mauserrifle

2018-10-12, 11:52
Both are up to date as mentioned in OP. Does not work for my NUC model Sad
Kodi Community Forum > Support > General Support > Linux > Atmos / trueHD 7.1 passthrough not working. 5.1 works