Looking Glass is an open source application that allows the use of a KVM (Kernel-based Virtual Machine) configured for VGA PCI Pass-through without an attached physical monitor, keyboard or mouse. This is the final step required to move away from dual booting with other operating systems for legacy programs that require high performance graphics.

load module with:
modprobe kvmfr static_size_mb=32

drmcru is a Linux DRM/KMS custom resolution utility.

It edits monitor EDID data, exports patched EDID binaries, and can install those overrides on supported systems so the kernel exposes custom modes after reboot. Hyprland integration is included for live mode discovery, switching, verification, and generated legacy monitor=... or Hyprland 0.55+ Lua monitor rules.