MP 1,1-5,1 Lost DisplayPort Big Sur

[Scrotorr]

On any of my Mac Pros (all 4,1->5,1 or native 5,1 - all running OpenCore .70) I have a handful of the HP GT 630 cards (single DVI, dual DP) - these all worked fine in Mojave, but I seem to lose the DisplayPort connections entirely on Big Sur. I have flashed different VBIOS, including a Mac Specific one (from LoremIpsum) and still no joy. I can slap in a High Sierra or Mojave drive and they work fine though.

Any ideas?

Thanks!

 

[h9826790]

Did you spoof the Board-ID in your OpenCore config?

 

[Scrotorr]

I actually used your pre-built and haven't changed anything at this point.

 

[Scrotorr]

Okay, a twist...

Ports output fine... but only when using a displayport to HDMI adapter.

So, is something in whatevergreen changing dp->HDMI automagically that might be screwing this setup up?

Thoughts?

Isaac

 

[lovely666]

I had an issue with the display ports on my Qudaro k5000 not working in big sur, until i added the bootargs agdpmod=vit9696,pikera (i don't know which option was required). I've moved to vega 64 since.

 

[h9826790]

Okay, a twist...

Ports output fine... but only when using a displayport to HDMI adapter.

So, is something in whatevergreen changing dp->HDMI automagically that might be screwing this setup up?

Thoughts?

Isaac

Try this