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I have a 29" monitor with 2560x1080 resolution, it works fine when directly connected to my Dell laptop but I can't set any resolution bigger than 1920x1080 when I use a Knup Type-C Hub KP-AD117. This hub provides an HDMI with 3 USB ports, I use it to quickly switch all my devices (mouse+keyboard+monitor) between work/personal laptops with a single USB-C cable. I don't have this issue with other operating systems, for example, my Macbook automatically sets the resolution to 2560x1080 when I plug the same hub, so I don't think it's a hardware compatibility problem. Windows 11 and all my drivers are up to date, I tried to switch USB ports and cables, but nothing fixed it.
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There's no driver for this adapter, it's as simple as it gets, and other operational systems can easily detect the correct resolution by plugging it in only. I tried the advanced display settings. I even tried to set the list of modes in the advanced display settings but 2560x1080 is just not available:
This is the expected list of resolutions that appears when I directly plug the monitor in, without adapter:
