Bernardo Magri
c840202018
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Bernardo's question: with "Laptop screen off" active, does the panel come back when the dock is yanked? VM answer (new maintainer harness tools/monitor-fallback.nix, softGL desktop): no — Hyprland 0.55.4 leaves the session with zero active outputs and never re-enables a soft-disabled monitor. rescue_blackout in the display hotplug watcher now re-enables every disabled output (immediate, retried, idempotent keyword + toast) whenever a monitorremoved leaves nothing active; independent of the profile auto-switch and its settings gate. Sharp edge documented rather than hidden: the zero-output state itself crashes Hyprland in the VM ~4/5 runs (aquamarine CBackend::dispatchIdle ABRT within ~0.5s — faster than any userland rescue; a control run removing the external with the panel ACTIVE survives 5/5, so the state is the trigger, not headless removal; crash reproduced with the rescue provably inert, so not caused by it). Rescue ships as defense-in-depth: it recovers every surviving case, and the worst case on real DRM is session-to-greeter on a re-lit panel instead of a black brick. Rider fix: `grep -c .` exits 1 at count zero — the ||-guard on that pipeline silently disabled the rescue exactly when it mattered. Verified: hazard V2 (VM reproduces the dead state); control discriminator 5/5; flake check green. V3 pending: real-dock undock-while-off in HARDWARE-QUEUE (run with nothing important open; crash on real DRM = rework the row to mirror or wait for a Hyprland bump). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>