16-inch MacBook Pro on macOS Catalina 10.15.5 - Closed Lid/Clamshell mode issue

tvs · 06-23-2020, 04:12 PM

I am also having issues with clamshell mode on an 13 inch MBP 2019/4-Port with Dell D6000 attached (one at work, one at home).

Running Catalina 10.15.5 and DisplayLink Manager 1.0.0. The device only has one built in graphics adapter (Intel Iris Plus Graphics 655 1536 MB)

When entering clamshell mode, the system automatically asks for a login, then after login periodically tries to sleep and wakes up on mouse movement. So the screen gets dark sometimes (at least once per minute) and comes back after 3-10 seconds.

Also, the 27 inch display (ASUS PB287QV) which is connected via DisplayPort is an "Unknown Display" whereas in "About this Mac > Displays" it shows with correct name but 41 inch size. So maybe there are handshake issues as well?

06-23-2020, 04:12 PM	#6
tvs Junior Member Join Date: Jun 2020 Posts: 4	I am also having issues with clamshell mode on an 13 inch MBP 2019/4-Port with Dell D6000 attached (one at work, one at home). Running Catalina 10.15.5 and DisplayLink Manager 1.0.0. The device only has one built in graphics adapter (Intel Iris Plus Graphics 655 1536 MB) When entering clamshell mode, the system automatically asks for a login, then after login periodically tries to sleep and wakes up on mouse movement. So the screen gets dark sometimes (at least once per minute) and comes back after 3-10 seconds. Also, the 27 inch display (ASUS PB287QV) which is connected via DisplayPort is an "Unknown Display" whereas in "About this Mac > Displays" it shows with correct name but 41 inch size. So maybe there are handshake issues as well? Last edited by tvs; 06-23-2020 at 04:16 PM.

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