Fixed!! Using superuser.com/questions/1396229/wi... and particularly this note: "If the correct resolution is already selected then select a incorrect one from list select apply ok then do the same thing for correct resolution. (Windows 10 version 20H2)". I switched the mode on the graphic card to 2560x1440 and it significantly improved, I then switched it back to what was set - 2560x1920 - and it works perfectly now!
I imagine you might try to find the same settings for the respective video driver - AMD or Intel/on-chip? I'm assuming you mean that you're driving an external monitor with the Surface and it's one of several inputs - such as my case where I'm driving a 4K with an MSI laptop (clamshell closed in most cases) and an Intel NUC on another input. I haven't had any difficulty in setting it up with the AMD equivalent control panel - just a bit different in how you get to the controls. You just have to experiment with it. There's always an odd dance between the OS and the GPU driver, even if it's an on-chip co-processor that Intel piggy-backs on their laptop chips.
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Fixed!! Using superuser.com/questions/1396229/wi... and particularly this note: "If the correct resolution is already selected then select a incorrect one from list select apply ok then do the same thing for correct resolution. (Windows 10 version 20H2)". I switched the mode on the graphic card to 2560x1440 and it significantly improved, I then switched it back to what was set - 2560x1920 - and it works perfectly now!
I am going to follow in your foot steps.
One curiosity, how do you get the Custom new "Full Screen Resolutions" for
a PBP x 2 or 4 - if your laptop does not have Nvidia GPU?
Can the same be done via Windows?
I wonder if anyone tried pushing one of these odd resolution spaces using a Surface Pro?
I imagine you might try to find the same settings for the respective video driver - AMD or Intel/on-chip? I'm assuming you mean that you're driving an external monitor with the Surface and it's one of several inputs - such as my case where I'm driving a 4K with an MSI laptop (clamshell closed in most cases) and an Intel NUC on another input. I haven't had any difficulty in setting it up with the AMD equivalent control panel - just a bit different in how you get to the controls. You just have to experiment with it. There's always an odd dance between the OS and the GPU driver, even if it's an on-chip co-processor that Intel piggy-backs on their laptop chips.