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Dell M3800 - black screen after wakeup - Catalina


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i have laptop as listed in title:

4702HQ, 16GB RAM, Bios A11.


I have issue - after wakeup from sleep screen remains dark (there is no backlight) but laptop works (i hear music, mouse click sound etc).

Before update to catalina, on High Sierra/Mojave all works ok.


Do you have any solutions for it? On forums peoples write to disable com ports but in this laptop there is no serial port. Also i remove all installed additional kext in library/extensions, cleared cache but no effects.


Best regards.


Kext lists loaded in clove and config.plist attached. 


Zrzut ekranu 2019-11-13 o 19.19.05.png


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