If you want a single application fullscreen, you can just not start a window manager though.

In practice multiple applications get confused, and some don't support -geometry or equivalent.

One specific case I dealt with was Chrome/Chromium that provided all sorts of annoyances until we dropped in a minimal WM (back then it was awesomewm, I didn't know about cage or it didn't exist yet)

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1718627440 a day ago | parent [-]

> applications get confused

Haven't had that yet. I thought of a single application the whole time, aka. kiosk, then it shouldn't matter.

	▲	p_l a day ago \| parent [-]
		In ye olden times, when most X11 applications understood "-geometry" and didn't try to do too much in absence of WM, things worked. Chromium and possibly others (Chromium is just what I have personally dealt with) was confused about what did it mean to be fullscreen, and various other ideas regarding placing itself on screen. I did success in making it work for a time, but it was problematic.