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Big Sur successful installation but black screen after restart

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I have the exact same problem here. After the restart, black screen. If I shut down it boots normally, it only does this at the restart. Sometimes it's upon boot as well quite randomly.

I've updated to the latest OC package and the latest bios. Boot arg: -v keepsyms=1 agdpmod=pikera

The only work-around for now is resetting the NVRAM and then it gets back in the screen after boot.

Did anyone found a solution to this problem with 5700XT on Big Sur?

It's a shame this happens as Big Sur works fantastic for productivity, would be fab to find a solution to this problem.

I'm attaching my EFI.

Thanks and Happy Xmax everyone! :)
 

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  • EFI.zip
    2.8 MB · Views: 51
Your EFI is OK

But you need change Bios settings

Super IO Configuration ->serial Port=Disabled
 
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I have a similar problem with Big Sur on my HP 8300 with RX 570.
My main monitor is plugged into the HDMI port. If it is the only monitor
plugged in, it goes dark before the OC picker, and only lights up again
towards the end of the boot process.

I find that if I plug a second monitor into the DVI port, the HDMI monitor
lights up from the beginning and stays lit through the OC picker process.
 
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