Macbook detects wrong screen size

I am using an external monitor DELL U2720Q Display with DisplayLink on my Macbook Pro. For some weird reason, the OS detects the screen to be 61 inches wide, which it is not. It is 27 inches and that impacts the resolution very badly. Texts are so small that they are unreadable.

I tried using the same with my Macbook Air M1 and there it works amazingly well. Can someone please help here?

MacBook Pro 15″, macOS 11.6

Posted on Dec 5, 2021 8:10 AM

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2 replies

Old Toad

Level 10

215,900 points

Dec 5, 2021 9:29 AM in response to nfn8y

Give this a try: Reset NVRAM or PRAM on your Mac - Apple Support

and How to reset the SMC of your Mac - Apple Support

nfn8y Author

Level 1

4 points

Dec 6, 2021 2:48 AM in response to Old Toad

Thanks @Old Toad!

I tried both of them one by one. It didn't work.

Here's another discussion on the same topic. This one is unresolved as well.

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Macbook detects wrong screen size