buy AMD 
just joking but please give us a few overview of the system with inxi as it always should be and described below, so we can see what graphic device and driver is active.
Welcome to Manjaro!
- Please read this:
[HowTo] Provide System Information
and press the three dots … below your post and press the
to give us more information so we can see what’s really going on.
Now we know the symptom of the disease, but we need some more probing to know where the origin lies…
- An
inxi --admin --verbosity=7 --filter --no-host --widthwould be the minimum required information for us to be able to help you. (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)
Also, please copy-paste that output in-between 3 backticks ``` at the beginning and end of the code/text.