Enable VRR? (FreeSync)

[Ehnoah]

Hey Guys!

I would love to ask if there is a way to enable VRR (FreeSync) on Big Sur?

When I'm using my Monitor on my Real M1 Mac, I got the VRR Option.
However, on my Hacintosh I only see 143,43 HZ (it is a 144 HZ Monitor with FreeSnyc)

No VRR Option is available.

GPU is 6900 XT.
Mainboard: MEG Unify X570 MIS
CPU: Ryzen 5950X

 

[Middleman]

Hey Guys!

I would love to ask if there is a way to enable VRR (FreeSync) on Big Sur?

When I'm using my Monitor on my Real M1 Mac, I got the VRR Option.
However, on my Hacintosh I only see 143,43 HZ (it is a 144 HZ Monitor with FreeSnyc)

No VRR Option is available.

GPU is 6900 XT.
Mainboard: MEG Unify X570 MIS
CPU: Ryzen 5950X

View attachment 7334

Is your AMD dGPU device properties PCIRoot tree populated? If not then may need the following. Here I use the RX6800 but you will need model set to RX 6900 XT instead as well as the key no-gfx-spoof with value set to 01000000 and type set to DATA. Reason for that is your 6950XT only works fully when spoofed to 6900XT:

 

[Ehnoah]

Hey,

my Device Tree is empty, what else should I add there?


I added the GPU there like yours:

Is everything required? (like rom-revision etc)

 

[Middleman]

Hey,

my Device Tree is empty, what else should I add there?


I added the GPU there like yours:

Is everything required? (like rom-revision etc)

View attachment 7338

Yes all is required. As for the rest, did you add agdpmod=pikera in the NVRAM boot-arg?

 

[Ehnoah]

Hey,

I added all that, but nothing changed, still no VRR. (The GPU is also detected without anything of that)

And working flawless, I just tried adding that, so I can use VRR. But seems still no VRR in Video Settings.
PS: My args are : keepsyms=1 alcid=1 agdpmod=pikera -hbfx-disable-patch-pci

 

[Middleman]

Hey,

I added all that, but nothing changed, still no VRR. (The GPU is also detected without anything of that)

And working flawless, I just tried adding that, so I can use VRR. But seems still no VRR in Video Settings.
PS: My args are : keepsyms=1 alcid=1 agdpmod=pikera -hbfx-disable-patch-pci

Actually I've just done some further research online for you on VRR. As it goes some sites
say there is VRR support while on Apple Support itself they say that there is no VRR support
in macOS (but your reply on the issue with the Mac Studio says otherwise).

So I've read if you experience flicker it would be best to turn off VRR on the monitor itself -
Monterey will then compensate for it and actually give you a better result (on hackintosh).

Other than that I have no further advice to offer you. The only other things I can think of
is if you try any of the extra settings mentioned by the Whatevergreen Github guide
on the use of extra settings such as -cdfon which enables HDMI 2.0 support and also see
if enabling VRR under the AMD Windows driver enables it on the card overall for macOS.
Whether that works with your AMD GPU and enables VRR is anyones guess.

 

[Shaneee]

Which SMBIOS are you using? I'm using MacPro7,1 and it's available on my 6800.