Aspect ratio does not match while using identical monitors

Please check connecting both monitors in Mirrored displays, setting your monitor native resolution.

The GPU only needs to do calculations for the 1 area, and the amount of memory required is only for the 1 image.

Once you have the result of above check and if it is clear. When you extend two monitors the GPU need to do calculation for 3 area, and the amount of memory required is for 3 images. This puts to a place where the limit of GPU can handle or support to maximum resolution.

I did a check with specs of your macbook pro and found out the below info:

• Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors (24bit)
• Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors (32bit)

Now comparing to your scenario of usage where the default refresh rate of your monitor is 75Hz.

I guess your MacBook pro has done the best by adjusting one of the monitor resolution.

See if you can try setting the resolution for connected display, below link to guide you.

https://support.apple.com/en-in/guide/mac-help/mchl86d72b76/10.14/mac/10.14

Hi Sharhari,

Please reference the below screenshots for the items you requested. The second screenshot illustrates the issue.

I have tried interchanging the cables, dongles, and ports and found that I am able to get one (not both) of each monitor to display the correct aspect ratio (i.e. I can get monitor 1 to display correctly on any port with any cable or dongle; I can get monitor 2 to display correctly using the same combinations of ports, cables, and dongles; but I cannot get both of them to display correctly at the same time).

Hi Sharhari,

I tried mirroring the displays, and se the display settings for both monitors to the the below. However, I am still experiencing the same issue as before where only one screen is displaying the correct aspect ratio.

resolution: 1080p

refresh rate 60 hz

Thanks,

Matt

If possible can you post a picture of your screens. To have an idea what exactly the issue look like.

Also post the result of the following command from the terminal: "system_profiler SPDisplaysDataType"

Above command should give us the info of GPU and its output to displays.

Please check if there is an issue with the cable adapter by connecting both cables individually to the same monitor.

Now with the two identical monitor. Only difference is the adapter firmware version.

We can isolate on which adapter we have this issue. Just unplug one off the monitor and run the command to identify which one is on ver: 0.00 & ver: 7.55.

Then take appropriate action to resolve the firmware issue. You may need to contact the manufacture on how to get it updated/fixed.

How are the both monitor's connected? Mirrored or As separate displays.