TBH: reading the N00b tutorial and doing a clean install without trying to use weird themes, applications from source, and applying the kernel parameters from your other posts would be the prudent thing to do…
KISS! (Keep It Simply Stupid)
and before you post your next question, please read this too:
P.S. If you enter a bit more details in your profile, we can also see which Desktop Environment you’re using, which CPU/GPU or Kernel, … you have without typing it every time
Bonne chance et désolé!
