After upgrade from 10.15 to 10.15.1 black screen on both HDMI outputs [Nitro+ RX570/4]

This morning I upgraded my "iMac Pro 1,1" from 10.15 to 10.15.1 after the first reboot the screen have become black, I waited for the second restart, no Apple logo and progress bar.

OS itself is running fine, it is visible over network and makes sounds.

I am booting via Clover. Posting this from 10.14.6 on the same hardware.

submitted by /u/stralex7
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