https://bugzilla.kernel.org/show_bug.cgi?id=207383
--- Comment #33 from Michel Dänzer (michel@daenzer.net) --- (In reply to rtmasura+kernel from comment #24)
xfwm4 --replace --vblank=glx &
FWIW, I recommend
xfwm4 --vblank=xpresent
instead. --vblank=glx is less efficient and relies on rather exotic GLX functionality which can be quirky with Mesa.