<< Solved >> Screen Freeze / black screen after wake

[zhili]

Try disabling serial port in your UEFI/BIOS.

but i can not find serial port on msi z270i

 

[glofter1]

GA-z77U3D same problem. reset bios. not wake up . WATCHING

 

[danilovitch]

So, sharing my experience
I solved this (apparently) turned off serial port on bios.
I can wake form sleep normally

I overlooked this setting and had lots of freezing problems updating an older Gigabyte H77 to Catalina. Thanks a lot!

 

[xenophon61]

Thank you, thank you, thank you.
Asus H97 Plus + RX580: did the trick.

 

[Fantomac]

Thanks works for my MSI z87gaming g45 + Radeon VII !

 

[Cirillo]

thanks for the advice, solved the problem, thanks! thanks! thank you !

 

[DiabloDW]

OMG
Thanks
SOLVED!!!

 

[ski4evr]

Try disabling serial port in your UEFI/BIOS.

Sweet! Worked for the black screen, post sleep on a Z97n board

 

[frei0135]

I was so excited to find this easy fix for this problem, but then I was frustrated to see that my serial ports were already disabled!!!! However, after installing the kext from freituk, wake from sleep seems to be working again. Thanks!

 

[mujeebkmr]

Thanks, It is worked for me on my GA-H77-DS3H
Catalina 10.15.5