Add disable compositing button

[Redo11]

please add this button, it is definitely possible and people need it

[tildearrow]

Hmmm... you sure disabling "Enable compositor on startup" has no effect when clicking Apply?

[Redo11]

it only enables, to disable you need to relogin or restart kwin,
which also is annoying, that crashing disables compositor on startup too, not just right now

[DarkWav]

Can confirm that unchecking the checkbox an clicking apply in compositor settings no longer disables compostiting. (Tested on Arch Linux)
As a quick workaround, use the ALT+SHIFT+F12 keyboard shortcut which still works fine.

[Redo11]

it did reload, but compositing still fully works

[DarkWav]

it did reload, but compositing still fully works

That is definitely not normal. I tested on both Intel+Mesa & NVIDIA and in both cases compositing disables correctly after pressing ALT+SHIFT+F12.

Can you check if ALT+SHIFT+F12 works on vanilla kwin for you? If it doesn't, you should probably report the issue upstream along with hardware information.