[Solved] Sleep/wake/lid not working after upgrade os to High Sierra

[Dell-Tester]

Fix EDID solved my problem. I extract EDID use DarwinDumper.app and use FixEDID.app to extract DisplayVendorID-xxx folder. Copy that folder to /System/Library/Displays/Contents/Resources/Overrides then reboot and sleep, wake, lid works like a charm

LordHung, you are AWESOME !

Followed your instructions, and the ones listed in the links below. I personally like the Clover injection method best, but tried your approach first (just to try and learn something new) and it just works flawlessly by putting the DisplayVendorID-xxx folder inside the Overrides folder.

It works great for High Sierra 10.13.3 on a Dell Inspiron 15 with i5-7200u and Intel HD 620.

References:

http://forum.osxlatitude.com/index.php?/topic/10236-how-to-fix-black-screen-in-high-sierra/
https://www.insanelymac.com/forum/t...e-overrides-automatically-for-apple-displays/

Thanks a lot to everyone, this is very appreciated.