As previously covered, a developer finally stepped up to offer a "TearFree" xf86-video-modesetting option for that generic DDX, similar to the TearFree option found in hardware-specific drivers like xf86-video-amdgpu. Enabling TearFree tries to provide tear-free screen rendering by utilizing hardware-specific page-flipping mechanisms. Screen tearing can still be common on the Linux desktop if running the X.Org Server and are not using a composited window manager.
Developer Sultan Alsawaf implemented the TearFree option for this commonly used, generic DDX driver for helping to eliminate tearing in environments lacking a compositor. Two shadow buffers are used for the tear-free implementation along with integrated damage tracking. More details on the implementation can be found via this merge request , which as of last week has been merged into the X.Org Server tree.
With the updated xf86-video-modesetting driver, the TearFree option is disabled by default unless enabling the option.