Operator confirmed "SDDM is the only greeter". Disable the two competing
display entry points that would contend with SDDM for the single-owner
GPU/card0: 20_greeter (redbear-greeterd, an alternative greeter) and 20_display
(redbear-session-launch, a boot-time auto-KDE-session that bypasses the
greeter). Gated reversibly via condition_path_exists on a sentinel
(/etc/redbear/enable-legacy-greeter) the image does not install — definitions
preserved, re-enable with a single touch. 21_sddm remains ungated. Post-login
session launch is SDDMs job via SessionDir=/usr/share/wayland-sessions.
vasilito
9f528397a8