Template:Why-tearfree-defaults-to-false-on-xorg

"The "TearFree" option isn't enabled by default because it has drawbacks (higher GPU memory consumption, performance overhead for unredirected fullscreen apps); also, it can be enabled at runtime with xrandr.

Maybe try barking up your DE's tree for not exposing a setting for that.

Don't like tearing? Use Wayland!"

Michel Dänzer, Red Hat Graphics Team, Xorg and Mesa developer and 26th largest contributor to Mesa 20.2.0
in a secret developers hangout called "#radeon on Freenode"
September 30, 2020