IdeaPad Conservation Mode

IdeaPad Conservation Mode is a Control Center shortcut plugin for Noctalia (v5) that toggles Conservation Mode — capping charging around ~60% to preserve battery health — via the ideapad_acpi kernel driver's conservation_mode sysfs attribute. That driver covers Lenovo IdeaPad and Legion laptops alike, not just Legion.

Writing that attribute needs root by default. The first time you click the tile and the write fails, the plugin opens a terminal and runs a bundled one-time setup script with sudo. It creates a lenovoctl group, adds you to it, and installs a udev rule so future writes are unprivileged. Log out and back in once afterward; every click after that just works, with no further prompts.

Plugin

Field	Value
ID	lux/ideapad-conservation-mode
Entries	Shortcut: conservation-mode

Requirements

The bundled setup script (scripts/setup-permissions.sh) shells out to sudo, dirname, env, bash, chgrp, chmod, getent, groupadd, usermod, cat, and udevadm. All of these ship by default on essentially every mainstream Linux distribution (coreutils, util-linux, shadow-utils, systemd/udev).

Usage

Add the conservation-mode shortcut under Settings → Control Center shortcuts. Click it to toggle Conservation Mode; the label shows the current state (On / Off / N/A if the sysfs attribute can't be found). The first click may open a terminal for the one-time sudo setup described above.

NixOS

/etc/udev/rules.d is generated from system config on NixOS, so the setup script exits instead of writing to it. Add the equivalent declaratively instead:

{
  users.groups.lenovoctl = {};
  users.users.<your-username>.extraGroups = [ "lenovoctl" ];

  services.udev.extraRules = ''
    ACTION=="add|change", SUBSYSTEM=="platform", DRIVER=="ideapad_acpi", RUN+="${pkgs.coreutils}/bin/chgrp lenovoctl /sys%p/conservation_mode", RUN+="${pkgs.coreutils}/bin/chmod 664 /sys%p/conservation_mode"
  '';
}

Rebuild, log out and back in, then click the tile.