Help Needed: Radeon RX 6900 XT Issue with nootrx.kext - 'Unsupported signal, check your device output' Error

[Danish297]

@CaseySJ @Edhawk @Shaneee @leesurone /All

I need assistance with fixing my MSI Radeon RX 6900 XT. I attempted to use nootrx.kext, but it gives me the error "Unsupported signal, check your device output."

Here’s what I’ve tried so far:
1. Removed WhateverGreen.kext and installed nootrx.kext (from this GitHub release) with boot arguments: -v debug=0x100 keepsyms=1.
2. Manually compiled nootrx.kext in both Release and Debug versions, following this tutorial.
3. Used nootrx.kext from this thread on tonymacx86. It worked briefly but then the system hung after a few minutes.
4. Created my own nootrx.kext following the steps from the thread mentioned in point 3, but I am still encountering the same "Unsupported signal, check your device output"
5. Followed the guide from this EliteMacx86 thread.

 

[Danish297]

I've never had an MSI video card but I don't think it's fair to say in general they are problematic. Also the link you posted had to do with their 5700 series cards, not the 6900 series, I'm not surprised that didn't work. It's possible there is something wrong with your video card, is it new or used? In another operating system do you have the same freezing issue?

It's new and working fine with windows 11.

 

[leesurone]

@CaseySJ @Edhawk @Shaneee @leesurone /All

I need assistance with fixing my MSI Radeon RX 6900 XT. I attempted to use nootrx.kext, but it gives me the error "Unsupported signal, check your device output."

Here’s what I’ve tried so far:
1. Removed WhateverGreen.kext and installed nootrx.kext (from this GitHub release) with boot arguments: -v debug=0x100 keepsyms=1.
2. Manually compiled nootrx.kext in both Release and Debug versions, following this tutorial.
3. Used nootrx.kext from this thread on tonymacx86. It worked briefly but then the system hung after a few minutes.
4. Created my own nootrx.kext following the steps from the thread mentioned in point 3, but I am still encountering the same "Unsupported signal, check your device output"
5. Followed the guide from this EliteMacx86 thread.

It's something in your EFI or a bios setting then....very odd.

 

[Danish297]

It's something in your EFI or a bios setting then....very odd.

They replaced my graphics card with an Asus Radeon RX 6800 XT and I simply added the -radcodec option to the boot arguments, without altering any EFI or BIOS settings. Everything is working smoothly now.

 

[Max.1974]

Hi i have same card but is Gigabyte, and bridge above its incorrect for this card, correct is Device (GFX0)

Use my Device Properties attached (copy and past) with PlistEdit Pro editor or ProperTree (need python installed) in your config.plist.

Need use WhateverGreen.kext with this boot-arg: agdpmod=pikera






Copy my SSDT-BRG0 to your ACPI folder and give OC Clean Snapshot or similar, using ProperTree.