Lenovo Thinkpad P1 Gen 3

i3 tearing/artifacts issue resolved by creating /etc/X11/xorg.conf.d/20-intel.conf with the following contents and rebooting:

Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
EndSection

Thanks to @DVM for the solution: R4.1 i3 window manager refresh issues - #3 by DVM

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