Image is torn into lines and stretched significantly, on Windows Boot.

[sklerder]

Hi !
Maybe you could solve the issue by using an external screen (HDMI, DVI, VGA) with a known resolution.

Alas, screen resolution at boot time is a really annoying problem, and is not simple to solve (even Microsoft seems to be impacted with this problem, the difference of comportment between W10/W11, MBR mode /UEFI mode and other configurations tend to prove it).