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GUIDE: HDMI Audio
- Thread starter andrejkw
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Should have access to a clean 5,1 that never messed with HDMI audio later this week. If there's anything quick/easy that would be beneficial or helpful to test, post some instructions and will attempt to try for you.
No need for step 2 in this case. I did steps 1 and 3, and my audio was back.
An alternative (which keeps AppleHDA.kext untouched) is to install AppleALC.kext, Lilu.kext, and HDMIAudio.kext. This option, however, did not work on my cMP (maybe it only works for hackintoshes).
Use latest lilu.kext and AppleALC.kext by installing it in System/Library/Extensions. Use kexts installer like kextbeast which is available on site tonymacx86
Now I don’t know which are the latest versions but the ones I downloaded from reddit.com/r/hackintosh section worked. Found it. Link here
No need for HDMIAudio.kext. It has reached it’s end of life.
But if you use AppleHDA.kext from 10.13.3 then you can use HDMIAudio.kext but for how long will you depend on 10.13.3 kext?
Now I don’t know which are the latest versions but the ones I downloaded from reddit.com/r/hackintosh section worked. Found it. Link here
No need for HDMIAudio.kext. It has reached it’s end of life.
But if you use AppleHDA.kext from 10.13.3 then you can use HDMIAudio.kext but for how long will you depend on 10.13.3 kext?
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This is a great solution (if I can get it to work). Could you confirm that you are on a cMP with an Nvidia graphics card? Are you also using NvidiaGraphicsFixup.kext?
Note: The 10.13.4 AppleHDAController binary fix in AppleALC.kext supports one Nvida HDMI codec device_id, 0x0fbb. Any other device id requires an edit to the patch. Once edited, recompile AppleALC and install the new AppleALC.kext. Credit: FredWst
Tried the Lilu.kext + manually edited AppleALC.kext. Not working on the 1080Ti yet.
Build succeeded
Kext loaded
But not working yet
Build succeeded
Kext loaded
But not working yet
Both kexts were loaded and reported as loaded in Extensions. But no sound via HDMI, GTX 980...
There are some boot arguments as far as I understand from the developers page for both kexts, for example:
There are some boot arguments as far as I understand from the developers page for both kexts, for example:
- “-alcbeta - to enable AppleALC on unsupported systems (usually unreleased or old ones)” ...Could this help?
Thanks for your help.
Yes, that was removed.
And HDMIAudio.kext is now reinstalled. Nil help.
But the IOReg file is too large, can't upload to here.
I'm interested in seeing the AppleALC approach work.
@h9826790 perhaps you could try the version of IORegistryExplorer provided at https://github.com/toleda/audio_ALCInjection and zip the exported file. In my case, the file was less than 1 MB.
@h9826790 perhaps you could try the version of IORegistryExplorer provided at https://github.com/toleda/audio_ALCInjection and zip the exported file. In my case, the file was less than 1 MB.
With a USB-C DisplayPort alternate card like the Sunix UPD2018 it should be possible. But since that card needs to be connected to the display port of the graphics card, it would still require HDMI (or DP) audio.
I ment, for example, using USB-C to HDMI cable with my Sonnet Alegro USB-C card in cMP. Was just wondering what would happen if I attach it to a spare HDMI port on a TV or some audio receiver - could I get sound output?
No. As I mentioned above, you would need a card with DP alternate mode.
Thanks both!
I didn't realise there is an IORegistryExplorer 2.1 on github, which export a much smaller file then the current IORegistryExplorer 3.0.2.
Anyway, here is the ioreg. Million thanks in advance!
The process that enabled all Nvidia HDMI audio codecs has been disabled in 10.13.4 AppleHDAController.kext.
IOReg show the Nvidia HDMI codec is not recognized, no AppleHDAController.
1080 Ti/HDMI audio codec id is 10ef.
The simplest fix to patch the binary (hex editor):
Binary: AppleHDAController
Find: de 10 1a 0e
Replace: de 10 ef 10 (1x)
AppleALC.kext_v1.2.6 does not support 10ef, the next release will.
Attached is a preview of the next version supporting 10ef
Install either method and reply with new IOReg.