Disable Sleep/Hibernate on Debian

_Disable_sleep.md

Disable Power Management and Graphical Login on Debian

If you use a laptop tucked away as a Linux host, you may want to disable any power manegement (sleep/hibernate) as well as any desktop environments, use this script:

disable_power_and_gui.sh

wget -qO- https://gist.githubusercontent.com/lbussy/2884187dcad127b1b9ad3bbeb5697d90/raw/disable_power_and_gui.sh | sudo bash

If you wish to reverse it:

restore_power_and_gui.sh

wget -qO- https://gist.githubusercontent.com/lbussy/2884187dcad127b1b9ad3bbeb5697d90/raw/restore_power_and_gui.sh | sudo bash

disable_power_and_gui.sh

#!/usr/bin/env bash
set -euo pipefail

require_root() {
    if [[ $EUID -ne 0 ]]; then
        printf "%s\n" "Please run as root."
        exit 1
    fi
}

mask_sleep_targets() {
    printf "%s\n" "Masking sleep and hibernate targets."
    systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
}

configure_logind() {
    printf "%s\n" "Configuring logind to ignore lid and sleep keys."
    mkdir -p /etc/systemd/logind.conf.d
    cat > /etc/systemd/logind.conf.d/disable-suspend.conf << 'EOF'
[Login]
HandleLidSwitch=ignore
HandleLidSwitchDocked=ignore
HandleSuspendKey=ignore
HandleHibernateKey=ignore
EOF
    systemctl restart systemd-logind
}

install_polkit_rule() {
    printf "%s\n" "Installing polkit rule to remove suspend and hibernate options."
    mkdir -p /etc/polkit-1/rules.d
    cat > /etc/polkit-1/rules.d/disable-suspend.rules << 'EOF'
polkit.addRule(function(action, subject) {
    if (action.id == "org.freedesktop.login1.suspend" ||
        action.id == "org.freedesktop.login1.suspend-multiple-sessions" ||
        action.id == "org.freedesktop.login1.hibernate" ||
        action.id == "org.freedesktop.login1.hibernate-multiple-sessions") {
        return polkit.Result.NO;
    }
});
EOF
    systemctl restart polkit 2>/dev/null || systemctl restart polkit.service 2>/dev/null || true
}

disable_graphical_boot() {
    printf "%s\n" "Setting default boot target to multi-user."
    systemctl set-default multi-user.target

    # Stop and disable common display managers if present
    local dms=(gdm gdm3 lightdm sddm lxdm slim)
    for dm in "${dms[@]}"; do
        if systemctl list-unit-files | grep -q "^${dm}\.service"; then
            printf "%s\n" "Disabling ${dm}.service."
            systemctl disable --now "${dm}.service" || true
        fi
    done
}

verify() {
    printf "%s\n" "Verification."
    systemctl is-enabled sleep.target && printf "%s\n" "sleep.target enabled." || printf "%s\n" "sleep.target is masked."
    systemctl is-enabled suspend.target && printf "%s\n" "suspend.target enabled." || printf "%s\n" "suspend.target is masked."
    systemctl is-enabled hibernate.target && printf "%s\n" "hibernate.target enabled." || printf "%s\n" "hibernate.target is masked."
    systemctl is-enabled hybrid-sleep.target && printf "%s\n" "hybrid-sleep.target enabled." || printf "%s\n" "hybrid-sleep.target is masked."
    local current_target
    current_target=$(systemctl get-default)
    printf "%s\n" "Current default target: ${current_target}."
}

main() {
    require_root
    mask_sleep_targets
    configure_logind
    install_polkit_rule
    disable_graphical_boot
    verify
    printf "%s\n" "Done. Reboot to apply graphical target change."
}

main "$@"

restore_power_and_gui.sh

#!/usr/bin/env bash
set -euo pipefail

require_root() {
    if [[ $EUID -ne 0 ]]; then
        printf "%s\n" "Please run as root."
        exit 1
    fi
}

unmask_sleep_targets() {
    printf "%s\n" "Unmasking sleep and hibernate targets."
    systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target
}

restore_logind() {
    printf "%s\n" "Removing logind override."
    rm -f /etc/systemd/logind.conf.d/disable-suspend.conf || true
    systemctl restart systemd-logind
}

remove_polkit_rule() {
    printf "%s\n" "Removing polkit rule."
    rm -f /etc/polkit-1/rules.d/disable-suspend.rules || true
    systemctl restart polkit 2>/dev/null || systemctl restart polkit.service 2>/dev/null || true
}

enable_graphical_boot() {
    printf "%s\n" "Setting default boot target to graphical."
    systemctl set-default graphical.target

    # Re-enable display managers if installed
    local dms=(gdm gdm3 lightdm sddm lxdm slim)
    for dm in "${dms[@]}"; do
        if systemctl list-unit-files | grep -q "^${dm}\.service"; then
            printf "%s\n" "Enabling ${dm}.service."
            systemctl enable --now "${dm}.service" || true
        fi
    done
}

verify() {
    printf "%s\n" "Verification."
    local current_target
    current_target=$(systemctl get-default)
    printf "%s\n" "Current default target: ${current_target}."
}

main() {
    require_root
    unmask_sleep_targets
    restore_logind
    remove_polkit_rule
    enable_graphical_boot
    verify
    printf "%s\n" "Done. Reboot to reach the graphical desktop."
}

main "$@"