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Just tried the solution on the post. USB 3.0 ports sill does not work for me :(

I did a direct update from Yosemite to El Capitan. I was using the GenericUSBXHCI.kext to make it work in using Yosemite. I understand that there are changes in El Capitan so this kext will not work anymore. Please help on any possible fix. Here is my IOReg and DSDT for reference. Thank you.

Hey we have the same problem but I have a nvidia gt 640 card, Have you found a solution yet???

Nevermind about the question, I figured it out, HDMI Audio is now working but no volume controls. Well thanks for the help toleda :)

Sorry for this noob question but I dont know what to change in the code like connector-type,nvcap,etc. for my graphics card? Do I just copy them to my DSDT?

Hi toleda, can you help me figure out why hdmi audio still doesn't work on my Nvidia GT 640. I followed your guide and now there's a HDMI / DisplayPort Output: Connection: Display on the Audio Section of System Information but it still doesn't appear on the sound output on system...

I am not using the DVI-D port. I use DVI-I port and use a VGA Adapter to connect to my primary display. It works fine when its the only one connected. The problem is when the two displays are already connected, the dvi-i with a VGA Adapter connected to my primary display and mHDMI connected to...

I am already using macPro 3,1 in my smbios.plist. Do you think the problem is the adapter? I currently use a VGA adapter to connect to my primary display and everything is working fine when the VGA Display is only connected. I think there's a problem detecting correctly the displays on boot...

Hi Kris404, I noticed that we have the same video card. Hows dual monitor working for you?? Im having problems when two monitors are connected in dvi-i/vga and mhdmi. After boot the VGA primary display goes blank and the mHDMI TV display is stuck at blank grey screen. The strange thing though is...

Thanks!, I'll try that!

Here's a copy of my IOReg

Hi toleda, could you help me what part I should edit on adding hdmi audio on my Nvidia Geforce GT 640. I don't really know much about editing DSDTs. HDMI Display works but with no sound. I am using GA-EP45-UD3L Motherboard.