Hibernation was broken for me since a long time. I postponed trying to fix it for such a long time. Then, I stumbled onto this post which had the fix!
To celebrate the finding, I’m sharing a NixOS module to enable hibernation.
As a prerequisite, you need to create a swap partition, as noted in the NixOS wiki.
As for the module, here it is:
{ config, pkgs, lib, ... }:
let
cfg = config.base;
in
{
options.base = {
hibernation = lib.mkOption {
description = ''
Options to configuration hibernation.
'';
type = lib.types.submodule {
options = {
enable = lib.mkEnableOption "hibernation";
device = lib.mkOption {
type = lib.types.str;
description = ''
Device used to store hibernation
information. Use lsblk to find it.
'';
example = "/dev/disk/by-label/swap";
};
hibernateAfterSleepDelay = lib.mkOption {
type = lib.types.str;
description = ''
Hibernate after sleeping for this long.
'';
default = "2h";
};
};
};
};
};
config = {
powerManagement.enable = true;
# Specifies where the hibernation info will be stored.
boot.kernelParams = [
"resume=${cfg.hibernation.device}"
];
# Allow hibernation
security.protectKernelImage = !cfg.hibernation.enable;
# Enable hibernation in menus
environment.etc = lib.mkIf cfg.hibernation.enable {
"/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla".text = ''
[Re-enable hibernate by default in upower]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes
[Re-enable hibernate by default in logind]
Identity=unix-user:*
Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.handle-hibernate-key;org.freedesktop.login1;org.freedesktop.login1.hibernate-multiple-sessions;org.freedesktop.login1.hibernate-ignore-inhibit
ResultActive=yes
'';
};
# Set suspend-then-hibernate as defaults
services.logind = lib.mkIf cfg.hibernation.enable {
lidSwitch = "suspend-then-hibernate";
extraConfig = ''
HandlePowerKey=suspend-then-hibernate
IdleAction=suspend-then-hibernate
IdleActionSec=2m
'';
};
#
systemd.sleep.extraConfig = lib.mkIf cfg.hibernation.enable
"HibernateDelaySec=${cfg.hibernation.hibernateAfterSleepDelay}";
};
}Happy hibernation!