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I updated my macOS Catalina to 10.15.4 two days back and since then I am having problem of black screen when I open the lid. It remains black for some time and then turns on by itself.
MacBook Pro 13", macOS 10.15
Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379
Try resetting the SMC https://support.apple.com/en-us/HT201295
Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379
Try resetting the SMC https://support.apple.com/en-us/HT201295
The only solution that really works is the one that apple does not support: downgrade to 10.15.3 There is a still unacknowledged bug in 10.15.4 that crashes the display driver in clamshell mode. I had to roll-back 10 machines until now.
Screen of Macbook pro 13 (2019) remains black even after lid is open
