How I fixed screen tearing on Cinnamon/Mint 22.3/AMD GPU

Despite my best intentions and trying all the settings that Mint would offer me, I had persistent screen tearing in videos and games.

I'm using Mint 22.3 with Cinnamon and a 9070XT AMD GPU. The fix was adding the Tearfree option to a config file.

The usual disclaimer: This will only work on AMD GPUs, if at all, it may not work for you and you may break your system by editing things wrong.

The config file in question is /etc/X11/xorg.conf.d/20-amdgpu.conf

The content of the file after my edit:

Section "Device" Identifier "AMD" Driver "amdgpu" Option "TearFree" "true" EndSection

So,

sudo nano /etc/X11/xorg.conf.d/20-amdgpu.conf

and put that text in or add the line with the Tearfree option if the rest of the config is already there. After rebooting the tearing is gone for me - hopefully for you too.