6800XT upgrade from Radeon VII crashing

[Technomad]

I've just swapped out my Radeon VII for a Sapphire 6800XT, having got OC0.7.0 stable under 11.4. Gets to the picker fine, boot process proceeds, then I get a whole screen of IOPlatformPanicAction -> IONVMeController + IOPlatformPanicAction -> AppleSMC. Then it reboots

Was working fine before swapping the GPU over. Works fine under Win10 & ubuntu.

Any thoughts?

TIA…

 

[AudioGod]

Have you added the boot argument agdpmod=ignore if you are using the SMBIOS MacPro7,1 or agdpmod=pikera if you are using SMBIOS iMacPro1,1.
This is the only thing you need to do to get a Navi or Big Navi working.

 

[Technomad]

Have you added the boot argument agdpmod=ignore if you are using the SMBIOS MacPro7,1 or agdpmod=pikera if you are using SMBIOS iMacPro1,1.
This is the only thing you need to do to get a Navi or Big Navi working.

Ah, v useful, thanks - I was using agdpmod=pikera - hadn't come across the ignore switch before! Many thanks for that. Now it's simply going black screen for about two minutes after boot, then appears just fine. Any ideas?

cheers and thanks again

 

[AudioGod]

Ah, v useful, thanks - I was using agdpmod=pikera - hadn't come across the ignore switch before! Many thanks for that. Now it's simply going black screen for about two minutes after boot, then appears just fine. Any ideas?

cheers and thanks again

Thats weird,
Try going into the bios and setting your PCIe slots to gen3

 

[Technomad]

Thats weird,
Try going into the bios and setting your PCIe slots to gen3

Funnily enough, Asrock appears to have removed that facility in its latest UEFI (I had it set that way for the Radeon VII). However… …a couple of NVRAM resets and it's booting just fine. Just got the small issue of sleep still not working and a new one - every time it shuts down, it immediately boots back up again. Hasn't done that before.

 

[AudioGod]

Funnily enough, Asrock appears to have removed that facility in its latest UEFI (I had it set that way for the Radeon VII). However… …a couple of NVRAM resets and it's booting just fine. Just got the small issue of sleep still not working and a new one - every time it shuts down, it immediately boots back up again. Hasn't done that before.

That’s sounds like a USB S5 state issue to me.
There’s one of two settings in the bios causing that.

1. ERP (Disable it)
2. USB power delivery in Soft off (S5) (Enable it)

Fix 2 is what needs to enabled on a ASUS X570 board, ASRock may have it named differently or not have the option at all. If it doesn’t have the option and ERP being disabled makes no difference then you need to create a SSDT and use a patch to fool MacOS into understanding the S5 state. Use the link below to get instructions on how to do it.

Fixing Shutdown/Restart | OpenCore Post-Install

 

[Technomad]

Braindead: w

That’s sounds like a USB S5 state issue to me.
There’s one of two settings in the bios causing that.

1. ERP (Disable it)
2. USB power delivery in Soft off (S5) (Enable it)

Fix 2 is what needs to enabled on a ASUS X570 board, ASRock may have it named differently or not have the option at all. If it doesn’t have the option and ERP being disabled makes no difference then you need to create a SSDT and use a patch to fool MacOS into understanding the S5 state. Use the link below to get instructions on how to do it.

Fixing Shutdown/Restart | OpenCore Post-Install

Many thanks - will look at that tomorrow, after deadline frenzy passes. I have dramatically improved things, simply by remembering to create a new PCI devices table, to replace the one I had for the Radeon VII and its PowerPlay entry. D'uh…