Visual Glitches on Ubuntu 20.04

Since a couple of days ago I am experiencing huge visual glitches on my screen (only in some apps). The issue gets worse while in high CPU usage. I've tried to update the video driver, but it didn't work. Any ideas?

00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)

It has been two days without any distortion or glitch on my screen, so I think it is reasonable to say that the problems were solved.

Time to share with the community what I did to get it fixed.

First, the solutions @vanadium suggested decreased the distortions somehow.

GRUB_DEFAULT=0 GRUB_TIMEOUT_STYLE=hidden GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR='lsb_release -i -s 2> /dev/null || echo Debian'
GRUB_CMDLINE_LINUX_DEFAULT="splash quiet iommu=pt i915.enable_psr=0"
GRUB_CMDLINE_LINUX=""

But this solution solved the problem, I created a /usr/share/X11/xorg.conf.d/20-intel.conf file with touch command and inserted these configs:

    Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "sna"
   Option      "TearFree"    "true"
   Option      "DRI"         "1"
    EndSection