Custom 4K Resolution on KDE Wayland (AMD GPU)

This repository contains configuration files and scripts to enable a virtual 4K resolution (3840x2160) at a stable 120Hz on a native 2K (2560x1440) monitor under KDE Plasma (Wayland) with an AMD GPU.

It resolves issues with native resolution limitations by adding custom video modes via kscreen-doctor and automating their application on user login.

• add-custom-resolution.sh: The main script that adds custom resolutions (60Hz, 120Hz, 144Hz, 165Hz) and applies 3840x2160 at 120Hz with a scale of 1.5 (150%).
• add-custom-resolution.desktop: Desktop autostart entry that runs the script on login.
• limine: Backup of /etc/default/limine containing kernel parameters.

1. Copy the script to your local bin directory:

   cp add-custom-resolution.sh ~/.local/bin/
   chmod +x ~/.local/bin/add-custom-resolution.sh

2. Copy the desktop entry to your autostart directory:

   cp add-custom-resolution.desktop ~/.config/autostart/

3. (Optional) Bootloader Kernel parameters (Limine): Add the following parameter to your /etc/default/limine configuration:

   video=DP-2:3840x2160@180
   

   And run:

   limine-update