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fix: never suspend the appliance #25

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fix: never suspend the appliance #25

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974f1dc
fix: never suspend the appliance
bpmct Jun 15, 2026
cd9391f
narrow to suspend only
bpmct Jun 15, 2026
654cd7c
also block hibernate (and hybrid-sleep)
bpmct Jun 15, 2026
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21 changes: 21 additions & 0 deletions configuration.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,27 @@ in
# compressed in-RAM swap device instead, sized to half of RAM.
zramSwap.enable = lib.mkDefault true;

# ── Never suspend or hibernate ──────────────────────────────────────
# The box is an always-on appliance (Coder server + k3s) reached over the
# LAN and a *.try.coder.app tunnel. Suspending or hibernating drops the
# NIC, so the machine silently falls off the network (no mDNS, no SSH,
# tunnel dies) until someone physically wakes it. The shipped image runs a
# KDE desktop, which exposes Sleep/Hibernate actions, and a stray
# `systemctl suspend` / `systemctl hibernate` (or the matching D-Bus call)
# would do the same. Mask the suspend, hibernate, and hybrid-sleep targets
# so all of those paths become a no-op.
#
# Scope is deliberately narrow: only the "drop off the network" sleep
# states are blocked. Idle/lid/power-key handling is left at NixOS
# defaults — the single concern is the box not putting itself to sleep.
systemd.targets.suspend.enable = false;
systemd.targets.hibernate.enable = false;
systemd.targets.hybrid-sleep.enable = false;
services.logind.settings.Login = {
HandleSuspendKey = "ignore";
HandleHibernateKey = "ignore";
};

# ── Networking ────────────────────────────────────────────────────────────
# Central default hostname. Install hosts override this: flake.nix's mkHost
# injects `networking.hostName = lib.mkDefault <folder-name>` for every
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