You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

ShyPhoenix Author

Level 1

4 points

Monitor resolution changes when MacBook lid is closed.

I recently purchased a Samsung ViewFininity 28" UR55 monitor that has a resolution of 3840 x 2160 with the intent of docking my MacBook (Air, M1) with the lid closed on my desk. Initially, I plugged the monitor in, and it worked perfectly. Today I switched power strips at my desk, unplugging and replugging the monitor and my MacBook in the process of it. Now, whenever I close my MacBook lid, my display changes from 3840 * 2160 @ 30Hz to 1920 * 1080 @ 60 Hz.

I've tried power cycling both the MacBook and the monitor. The monitor is hooked up via HDMI to an Anker USB-C hub (A8336) which also does power delivery and provides USB-A ports for my MacBook. I've spent about an hour looking online for solutions, and none of which have worked.

I've attached photos of the display, macOS's Display settings panel, and the monitor's information popover for when the MacBook is closed and when the MacBook is open.

Also puzzling and possibly related to this issue is that under Display settings, sometimes I get an option for "Default", "More space", and "Less space", and other times I am given a list of resolutions (most of the time).

Any idea what is causing this?

Lid Closed:

Lid Open:

MacBook Air 13″, macOS 13.1

Posted on Dec 28, 2022 11:56 AM

Monitor resolution changes when MacBook lid is closed.

Similar questions