Ubuntu Monitor Artifacts FIX
1. Change GRUB config file:
gedit /etc/default/grub
Changed this line:
GRUB_CMDLINE_LINUX=""
to this:
GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt"
then:
sudo update-grub && sudo reboot
2. Update kernel iniframs:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
cd linux-firmware/
sudo cp -va amdgpu/ /lib/firmware/
sudo update-initramfs -u
reboot