Help with setting up Ultrawide display

[brendonpagano]

Hi everyone. I'm trying to set-up my ultrawide display on a Macbook Pro (2019, Intel).

I was able to get it working perfectly while under the Trial for the Pro version, now I bought the Pro version but can't get it to work again.

The display is an LG Ultrawide with 2560x1080 resolution, 75hz refresh rate, connected to the laptop via HDMI. When I get the correct resolution to show up, on System Settings > Displays, it letterboxes the entire image, leaving the correct aspect ratio but only using like half the screen (I'll attach a picture for reference).

System Settings > Displays:

Detect DDC Capabilities

Settings I've changed while trying to troubleshoot:

The problem is likely simple, as I was able to make it work before under the Trial version, but now can't seem to do it.

Thanks in advance for the help!

[waydabber]

Hi there - you seem to have an edited native resolution of 2560x1080.

To establish a baseline I would first reset display settings:

Check the resolution list and see if the image is right. You may have 2560x1080 HiDPI enabled already. Also, make sure the native 5120x2560 resolution actually works at 75Hz or not (it may be available in 60Hz only).

Then, try enabling flexible scaling only and see if 2560x1080 HiDPI looks and works fine.

Then configure the default resolution to the 2560x1080 variant.

[brendonpagano]

Hi @waydabber , thank you very much for the response and software.

This is my resolution list under System Settings after "Reset All Display System Settings" under Better Display:

This is the unaltered (right after reboot from Reset) resolution list from the Better Display dropdown:

I don't see 5120x2560 resolution anywhere, should I activate something to see it? Also, this is not the native resolution of the monitor (maybe its the resolution for retina or scaling? sorry, I'm still learning about loDpi and hiDpi).

I've just enabled Flexible Scaling, will reboot and see if 2560x1080 appears as an option anywhere (and if it stops letterboxing)