Mojave to Catalina upgrade DP not working

[Barry_dhb52]

After a quite smooth running /w Mojave (both Clover, OC build), a few days ago I upgraded to Catalina soon after public release, and I found out DP output to black screen, then I switch to HDMI, it works. When DP goes black screen, unplug then plug the cable, screen comes back then gone.

After a lot of searches, I found out some simalar cases, but none of them have a solution,
today I was quite happy to find out this post is https://www.tonymacx86.com/threads/majove-to-catalina-displayport-not-working.284983/.
which solving by swithing to iMac19,1, which I think WEG quite needs an enhancement

But I tried with no luck.

 

And I don't know is it relevant to this issue, sometimes wakeup, I got panic, somehow like this:

      Kernel Extensions in backtrace:
         com.apple.driver.AppleACPIPlatform(6.1)[927FAB0F-5B29-3E31-A1A4-DA7E904986C4]@0xffffff7f96b8c000->0xffffff7f96c26fff
            dependency: com.apple.iokit.IOACPIFamily(1.4)[9BA2613C-A129-3EDD-8DC1-2CFF6B62B832]@0xffffff7f9528f000
            dependency: com.apple.iokit.IOPCIFamily(2.9)[E6E855AD-A5B2-3518-A997-1384B4360708]@0xffffff7f952a1000
            dependency: com.apple.driver.AppleSMC(3.1.9)[EB9D605D-85B1-3506-8B2E-ABD195817A4F]@0xffffff7f952de000

whole panic log in attachment 

My build:
Asrock z370 gaming itx/ac
i3 8100
Only Intel UHD630 with LG UL550 4k monitor

 

 

Or is there any guide how to do some logging for this issue?
thanks

panic-log.txt

EFI.clover.zip