Affected only in selective cases, but I guess reporting should be fair:
System:
Host: msBox Kernel: 5.4.0-58-generic x86_64 bits: 64 Desktop: MATE 1.24.0
Distro: Ubuntu 20.04.1 LTS (Focal Fossa)
Machine:
Type: Laptop System: Dell product: Inspiron 5567 v: N/A
serial: <superuser/root required>
Mobo: Dell model: 0J0MJ4 v: A00 serial: <superuser/root required>
UEFI: Dell v: 1.2.6 date: 07/09/2018
Graphics:
Device-1: Intel HD Graphics 620 driver: i915 v: kernel
Display: x11 server: X.Org 1.20.8 driver: intel resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.0.8
$ lspci
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260/M265 / M340/M360 / M440/M445 / 530/535 / 620/625 Mobile] (rev c3)
Variables that could be of effect:
/etc/environment
DRI_PRIME=1
/etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "TearFree" "true"
EndSection
Was experiencing sync-line glitch.