The original poster did though.
You should maybe start your own thread and include system information like
inxi -Farz
Though I might note that …
What does this mean? That you use something like optimus-manager?
(You probably shouldnt.)
Oh, looks like you are.
Well … first steps are to remove that garbage and undo the extra things it requires.
(like the hacky additions to your display manager [lightdm])