Change the login screen (SDDM) background on KDE Kinoite

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Overview

Image

  1. Even after changing the login screen (SDDM) background, it does not apply
  2. This is because Kinoite is immutable and /usr/share/sddm cannot be modified

Fix

Mount /usr/share/sddm to a user-controlled path

$ CUSTOM_PATH=/var
$ sudo cp -r /usr/share/sddm $CUSTOM_PATH
#       src               target        fstype options dump fsck
$ echo "$CUSTOM_PATH/sddm /usr/share/sddm none rbind 0 0" | sudo tee -a /etc/fstab

Reboot to apply changes.