The issue happens on 60hz as well.
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https://bugs.launchpad.net/bugs/1902522
Title:
Scrambled pixels in blocks with lenovo dock gen 2 thunderbolt 3 DP 1.4
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Public bug reported:
I am experiencing issues with rendering on 1440p@165hz in Ubuntu 20.04
with Lenovo Dock Gen 2 thunderbolt 3 40AN through DP 1.4. Depending on
what is rendered and mouse position the screen can get blocks of
scrambled purple pixels. These blocks are always horizontally half of
