Mountain Lion HDMI Audio

[toleda]

Yes, video works like a champ, only audio doesn't want to cooperate.

Try the NVCAP you previously injected in the dsdt.

 

[TheConnactic]

You mean, put back the NVCAP only? Or should i add all the other injections?

Best regards!

 

[toleda]

You mean, put back the NVCAP only?

Just NVCAP, add 2 to Store (Package...

 

[TheConnactic]

Thank you very much again, Toleda!

Still no good news: HDMI audio not working yet.

Here's the edited DSDT (with NVCAP) plus IOReg (with the TV connected to the HDMI port): View attachment Archive5.zip

Reading the IOReg, i found these three passages interesting:

- connector-type Data <00 08 00 00> (my comment: in NVDA,DisplayB@1, i think it's clearly identified as a HDMI connector, right?)

- DigitalAudioCapabilities Dictionary 2 values (my comment: in HDEF, have no idea what does it mean)
DisplayPort Number 0x0
HDMI Number 0x1

- hda - gfx Data <"onboard-1"> (my comment: in GFX0@0, is that correct?)

Best regards!

 

[toleda]

- connector-type Data <00 08 00 00> (my comment: in NVDA,DisplayB@1, i think it's clearly identified as a HDMI connector, right?)

That is a dsdt injection, required in every AppleHDA.kext for Nvidia HDMI audio since 10.6.5. The problem is av-signal-type: 2; it should be 8 for the HDMI connector. THe NVCAP made no diference, you can remove the injection.

Try these experiments:
1. Backup your AppleHDA.kext, edit AppleHDA binary, save, install, restart and reply with IOReg.
HexEdit AppleHDA binary
Find
06 00 de 10
Replace
07 00 de 10
2. Install Interim Realtek Ivy Bridge Lion AppleHDA, restart and reply with IOReg.
Make a screenshot of System Information/Graphics/Displays

 

[TheConnactic]

Hi, Toleda!

Let's go:

Experiment 1 - No perceived change: View attachment Experiment1.zip

Experiment 2 - Lost my audio (expected, since my CODEC is not supported by the kext), but the sound icon is grayed as if it was at maximum volume when my TV is connected to the HDMI port, like it would be with working HDMI audio (when disconnected, the usual grey and mute for not supported HDA). In System Preferences/Sound, the only output that shows up is a "Display Port" output. In System Report, the HDMI is listed, this time with more detailed description (with previous attempts, its only description was "display", when it showed up), and curiously all the other jacks are also listed, despite i am having no sound: View attachment Experiment2.zip

Best regards and thank you very much indeed!

 

[toleda]

i am having no sound:

Last suggestion, add this to dsdt/GFX0, increase Store (Package... by 2.

                                        "@1,av-signal-type",
                                        Buffer (0x04)
                                        {
                                            0x08, 0x00, 0x00, 0x00
                                        },

Try with you your 269 AppleHDA.kext and the Interim AppleHDA.kext.

 

[herbie12]

in order to make hdmi work on my mobo should i replace my discrete graphics which is a palit nvidia geforce gtx 570 or this card good to go when it comes to hdmi audio on ML.ty for future replies cause right now i need a dvi2hdmi cable where the dvi is connected to my discrete graphics card while the hdmi is connected to the monitor.

 

[Keegrom]

Still bad. IOReg says there is an enabler installed. Find it and remove it. If you cannot find it, fresh install. No response when no IOReg attached.

So I've restarted from Scratch fresh install.
No audio helper installed at all so no audio but Airplay.
Attached are DSDT.aml and ioreg after the patch/compile.

https://www.dropbox.com/sh/bf7hnf6e72b38jl/g5px8Qn2M1/Keegrom.zip


Thank you for your time.

 

[toleda]

in order to make hdmi work on my mobo should i replace my discrete graphics which is a palit nvidia geforce gtx 570 or this card good to go when it comes to hdmi audio on ML.ty for future replies cause right now i need a dvi2hdmi cable where the dvi is connected to my discrete graphics card while the hdmi is connected to the monitor.

The GTX 570 makes HDMI audio in ML with the HDMI audio dsdt edits. Why don't you use the 570 HDMI connector with a HDMI cable to the TV?