Comment 11 for bug 1871721

I managed to solve it on my laptop by:

1- in this file */usr/share/X11/xorg.conf.d/10-nvidia.conf*, I added this line:
`Option "PrimaryGPU" "Yes"`

2- in this file */usr/share/X11/xorg.conf.d/10-amdgpu.conf*, I changed this line
`Driver "amdgpu"`
to
`Driver "modesetting"`

I found this solution here:
https://forums.linuxmint.com/viewtopic.php?p=1804429#p1804429