Comment # 3 on bug 907682 from Hrvoje Senjan

(In reply to ill lume from comment #0)
> and is still present and is the version that
> runs by default at bootup instead of kwin5.

that cannot be. i myself even sent patches upstream so switch to kwin_x11 works
as intended, and to make sure 4.x and 5.x kwin are coinstallable.

how did you concluded kwin/4 is running?