Audio issue - Dell U3415w

[michael.t]

Hi guys,

I've just finished a Hackintosh build with El Capitan. Everything went relatively smooth, but I'm having an issue with the audio.
I'm using a Dell 34" Ultrawide U3415w which has inbuilt speakers, and connected via display port to an MSI GTX 980 Ti gaming 6G video card.
I'm able to get audio from the headphone jack as well as the line-outs on the rear of the MB. However I'm unable to get sound from the inbuilt speakers of the monitor. Not sure if it has anything to do with the nVidia drivers for OS X (346.03.10), or if the MB is just not detecting the monitor speakers.

Any ideas?

Thanks

 

[michael.t]

Update:

So trawling various forums, and it seems that El Capitan has SIP, which disables unsigned kexts from loading into boot. Could this be my problem?

I've enabled the flags bootflags rootless=0 and kext-dev-mode=1.
I've also entered the following code into config.plist in clover configurator.

<key>RtVariables</key>
<dict>
<key>CsrActiveConfig</key>
<string>0x67</string>
<key>BooterConfig</key>
<string>0x28</string>
</dict>

The reason I've done this is because I've read that the above things disable SIP.

After doing this, I've tried both kexts HDMIAudio-1.0 and HDMIAudio-1.1.

Nothing works.

Running out of options here. Can anyone suggest anything?