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OtinG · 04-12-2022, 11:26 AM

Not related to UC, but a few days ago I disconnected my Dell U2515H 25" monitor (used as extended monitor) from my MacBook Air M1, rearranged my home office workspace, then reconnected it. I have an Anker USB-C hub plugged into one of the MacBook Air M1 USB-C ports, and the Dell monitor is plugged into the HDMI port on the hub. After plugging the Dell monitor back into the hub (which was still connected to the MacBook Air M1), the Dell monitor and the MacBook Air M1 couldn't see each other, so the Dell kept going into sleep mode. I tried unplugging the HDMI a few times on both the hub and Dell, but it didn't help. Finally I unplugged the hub from the MacBook Air M1 then replugged it in, then the monitor was found and began working as it should.

I've noticed that with the MacBook Air M1 that devices plugged directly into its ports tend to work fine. However devices plugged into an adapter cable or into a hub which are connected to a MacBook Air M1 USB-C port can, and often are, flaky as far as connection goes.

It could have been a Dell issue too of course. When I used the Dell monitor plugged directly into my 2012 Mac mini's mini-Displayport port, any time I restarted the mini, or put it in sleep mode, it was difficult to get it to recognize the monitor. I read that the minis have an issue with that, so that might have also been a mini issue. It would often take 10 minutes or more of retrying in order to get the mini and Dell back together and running again.

04-12-2022, 11:26 AM	#10
OtinG Old Gadget Guy Posts: 1,913 Karma: 6854865 Join Date: Jun 2018 Device: Oasis 3, iPhone 13 Pro Max, iPad mini 6, iPad Air 2020, Alexa Devices	Not related to UC, but a few days ago I disconnected my Dell U2515H 25" monitor (used as extended monitor) from my MacBook Air M1, rearranged my home office workspace, then reconnected it. I have an Anker USB-C hub plugged into one of the MacBook Air M1 USB-C ports, and the Dell monitor is plugged into the HDMI port on the hub. After plugging the Dell monitor back into the hub (which was still connected to the MacBook Air M1), the Dell monitor and the MacBook Air M1 couldn't see each other, so the Dell kept going into sleep mode. I tried unplugging the HDMI a few times on both the hub and Dell, but it didn't help. Finally I unplugged the hub from the MacBook Air M1 then replugged it in, then the monitor was found and began working as it should. I've noticed that with the MacBook Air M1 that devices plugged directly into its ports tend to work fine. However devices plugged into an adapter cable or into a hub which are connected to a MacBook Air M1 USB-C port can, and often are, flaky as far as connection goes. It could have been a Dell issue too of course. When I used the Dell monitor plugged directly into my 2012 Mac mini's mini-Displayport port, any time I restarted the mini, or put it in sleep mode, it was difficult to get it to recognize the monitor. I read that the minis have an issue with that, so that might have also been a mini issue. It would often take 10 minutes or more of retrying in order to get the mini and Dell back together and running again. Last edited by OtinG; 04-12-2022 at 11:30 AM.