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December 6th, 2021 02:00
U2720Q, MacBook Pro detects wrong screen size
My MacBook Pro 2019 15" detects the Dell U2720Q as a 61" (3840×2160).
Operating System: macOS Big Sur Version 11.6.1
I'm running it using an HDMI 3 and DisplayLink manager.
I have another monitor Dell U2719D running at the same time with the same device which is being detected correctly.
Note: Please do not ask me to use a scaled display. It is really not efficient as it lags. Even external applications like Display Menu make the screen blurry, so they are not entirely usable. Please advise how I can make the machine detect the screen as a 27" screen. Also, I have already tried SVM and NPRAM reset. That didn't work either.
Here's a similar discussion on Apple Forum
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jphughan
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December 6th, 2021 05:00
@nfn8y How is DisplayLink Manager coming into play here? Are you connecting the dock through a DisplayLink adapter or dock? And I don’t know what “an HDMI 3” is.
A 27” 4K display is a poor choice overall for a Mac anyway fyi, for reasons I described in the post marked as the solution in this thread. Using a Scaled resolution may in fact be your best choice if you are committed to keeping that display.