Connecting ASUS monitor to Macbook Air M2

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Connecting ASUS monitor to Macbook Air M2

Hello, I am having issues connecting my ASUS (27” (27-inch viewable) Eye Care Monitor (VZ27EHF) - Full HD (1920 x 1080), IPS, 100Hz, 1ms, Frameless, Adaptive-Sync, HDMI) monitor. I am connecting via an HDMI cord and hdmi to usbc dongle (LENTION USB C Hub Multiport Adapter with 100W PD Charging). I am unable to get my monitor to recognize that it is connected to my laptop, however, my laptop recognizes that the monitor is connected. I have tried just about everything that I can find on the internet to help but nothing seems to make a difference. Of note, my monitor was able to connect to my ipad with the same dongle and cord just fine, as well as my old macbook pro.

The only odd thing that i have noticed is that when I go into display settings and click on my monitor, the refresh rate is set at 25hz and there are no other options to change it to. I know this monitor can support up to 100hz, so I am not sure why this is the only option. I also cannot find an option to change my laptop's refresh rates. Any tips would be appreciated, I use this monitor frequently for school and don't want to buy a new one :')

MacBook Air, macOS 15.0

Posted on Sep 24, 2024 3:12 PM

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Answer 1

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Servant of Cats

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40,339 points

Sep 25, 2024 6:31 AM in response to jennah288

jennah288 wrote:

I am unable to get my monitor to recognize that it is connected to my laptop, however, my laptop recognizes that the monitor is connected.

This is probably related to

the refresh rate is set at 25hz

The tables in the monitor manual indicate that the monitor can operate in 1920 x 1080 @ 60 Hz mode. However, there are no entries indicating that it can operate at a refresh rate as low as 25 Hz.

If some negotiation involving the computer, the hub, and the monitor is leading the computer to conclude that it's talking to a monitor with a refresh rate of 25 Hz, the monitor may be refusing to display the video signal, because that signal does not have one of the preset timings.

I suppose that you could try a different USB-C hub, or USB-C (DisplayPort) to HDMI adapter.

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Answer 2

Sep 25, 2024 6:25 AM in response to jennah288

Asus – ASUS VZ27EHF Eye Care Gaming Monitor – 27 inch Full HD (1920 x 1080), IPS, Frameless, 100Hz, Adaptive-Sync, 1ms MPRT, HDMI, Low Blue Light, Flicker Free, Wall Mountable

Looks like there is only one video input – a HDMI input. Note that while your Mac can support a very high resolution monitor, there is no guarantee that you can drive any monitor at a refresh rate greater than 60 Hz.

Amazon – LENTION USB C Hub with 100W Charging, 4K HDMI, Dual Card Reader, USB 3.0 & 2.0 Compatible 2023-2016 MacBook Pro, New Mac Air/Surface, Chromebook, More, Stable Driver Adapter (CB-CE18, Space Gray)

The description of this hub says that it has a "4K @ 30 Hz" HDMI output and that it "Support [sic] 3840x2160 4K@30Hz, 2560x1600 and lower resolutions at 60Hz."

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Connecting ASUS monitor to Macbook Air M2

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