Mojave external monitor problems

Baldrake

macrumors 6502
Original poster
May 22, 2012
335
352
Great White North
Anyone else seeing this? When I attach my MBP to my external monitor, it connects. Then after 30 seconds or so, the monitor goes blank claiming no signal. 30 seconds or so later, it connects again, then disconnects again, and so forth.

It worked fine under High Sierra.

This on a 2016 MBP 15”.

Very irritating, obviously.
 

basher

macrumors 6502
May 27, 2011
447
18
Glendale, AZ USA
Anyone else seeing this? When I attach my MBP to my external monitor, it connects. Then after 30 seconds or so, the monitor goes blank claiming no signal. 30 seconds or so later, it connects again, then disconnects again, and so forth.

It worked fine under High Sierra.

This on a 2016 MBP 15”.

Very irritating, obviously.
No issues with my MBP connected to a Thunderbolt 2 display.
 
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SCMedic

macrumors regular
Feb 8, 2008
186
41
Updated to Mojave, and my Dell Ultrawide suddenly gets a "no signal" from my 2017 iMac and 2017 MBP.

I'm going to try swapping cables, but it seemed awfully coincidental that it stopped working after updating.
 

SCMedic

macrumors regular
Feb 8, 2008
186
41
Update: Swapped cables and for some god forsaken reason, my cable died at the exact time I updated. What are the chances?
 
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