M1 Dual Monitor Anomalies

Ezevans · 02-08-2021, 06:16 PM

I am using an M1 MacBook 13" with two acer H236HL monitors. I am running the Acer monitors through a Targus Model DOCK190. I was very excited for this remedy because of the one external monitor limit of the M1. It is mostly great with a few exceptions. Most times when my screens go to sleep and I awaken them they exhibit a few undesirable behaviors. The first behavior is that one or more of them comes back as a mirrored monitor of my MacBook. This can be remedied by unplugging the USB C cord from the MacBook to the Targus. The second behavior is that when they awaken the assigned desktop backgrounds are forgotten. The third behavior is that windows that I had open with certain applications switch from left display to right display. This sounds easy to fix but gets complicated because Sketchup for Mac has may associated tool windows that take a long time to set up and or move to a new display. Some of the behaviors happen after unplugging and replugging the USB C cable.

Would love some remedies

02-08-2021, 06:16 PM	#1
Ezevans Junior Member Join Date: Dec 2020 Posts: 3	M1 Dual Monitor Anomalies I am using an M1 MacBook 13" with two acer H236HL monitors. I am running the Acer monitors through a Targus Model DOCK190. I was very excited for this remedy because of the one external monitor limit of the M1. It is mostly great with a few exceptions. Most times when my screens go to sleep and I awaken them they exhibit a few undesirable behaviors. The first behavior is that one or more of them comes back as a mirrored monitor of my MacBook. This can be remedied by unplugging the USB C cord from the MacBook to the Targus. The second behavior is that when they awaken the assigned desktop backgrounds are forgotten. The third behavior is that windows that I had open with certain applications switch from left display to right display. This sounds easy to fix but gets complicated because Sketchup for Mac has may associated tool windows that take a long time to set up and or move to a new display. Some of the behaviors happen after unplugging and replugging the USB C cable. Would love some remedies