Can a non-preset display resolution be applied via the KScreen KCM?

Rationale

In kcm_kscreen, I see a list of choosable presets, but not a way to input a custom resolution (at the least, < my display’s maximum), which makes getting the most of VM real estate, when tiled on a 16:9 display, difficult:


Context

Not as far as I’m aware, because this isn’t implemented: 456697 – [Wayland] Please provide a means to specify a custom modeline

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@johnandmegh, thank you again! That bug appears to be describing a kind of frequency overclock for monitors, although the commands it lists do appear to include a way to modify the resolution. Have I misunderstood it?

It’s describing refresh rates, which as far as I understand, are all part of the same attribute communicated by the monitor - along with resolutions - about what “modes” are supported.

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