SmugZombie · August 2, 2024 20:26
diff --git a/enableHibernationUbuntu.sh b/enableHibernationUbuntu.sh
 #!/bin/bash

 # This script configures suspend mode and prepares for hibernation on Ubuntu 24.04
 # It ensures swap space is sufficient and configures GRUB for proper resume settings

 # Check if the script is run as root or with sudo
 if [ "$(id -u)" -ne 0 ]; then
    echo "This script must be run as root or with sudo."
    exit 1
 fi

 # Function to check and adjust swap size
 adjust_swap() {
    local RAM_SIZE=$(free -m | awk '/^Mem:/{print $2}')
    local SWAP_SIZE=$(free -m | awk '/^Swap:/{print $2}')
    local SWAP_FILE="/swapfile"

    echo "RAM size: ${RAM_SIZE}MB"
    echo "Current swap size: ${SWAP_SIZE}MB"

    if [ "$SWAP_SIZE" -lt "$RAM_SIZE" ]; then
        echo "Current swap space is less than RAM size. Adjusting swap space..."
        # Disable and remove current swap file if it exists
        swapoff -a
        [ -f $SWAP_FILE ] && rm -f $SWAP_FILE

        # Create a new swap file with size equal to RAM size
        fallocate -l ${RAM_SIZE}M $SWAP_FILE
        chmod 600 $SWAP_FILE
        mkswap $SWAP_FILE
        swapon $SWAP_FILE

        # Add swap file entry to /etc/fstab if not already present
        if ! grep -q "$SWAP_FILE" /etc/fstab; then
            echo "$SWAP_FILE none swap sw 0 0" | tee -a /etc/fstab
        fi

        echo "Swap space adjusted to ${RAM_SIZE}MB."
    else
        echo "Current swap space is sufficient."
    fi
 }

 # Function to configure GRUB for hibernation
 configure_grub_for_hibernation() {
    local SWAP_UUID=$(blkid -o value -s UUID $(findmnt -no SOURCE --target /swapfile))
    local RESUME_FILE=$(readlink -f /swapfile)
    local RESUME_OFFSET=$(filefrag -v $RESUME_FILE | awk '/^ *0:/{print $4}' | sed 's/\..*//')

    echo "Configuring GRUB for hibernation with resume UUID $SWAP_UUID and offset $RESUME_OFFSET"

    # Add or update GRUB configuration
    sed -i.bak -r "s|^(GRUB_CMDLINE_LINUX_DEFAULT=).*|\1\"quiet splash resume=UUID=$SWAP_UUID resume_offset=$RESUME_OFFSET\"|" /etc/default/grub

    # Update GRUB
    update-grub

    echo "GRUB configuration updated. Please verify the settings and reboot if necessary."
 }

 # Update and upgrade the system
 apt update && apt upgrade -y

 # Install necessary packages (if not already installed)
 apt install -y pm-utils

 # Enable suspend on lid close (for laptops)
 gsettings set org.gnome.settings-daemon.plugins.power lid-close-battery-action 'suspend'
 gsettings set org.gnome.settings-daemon.plugins.power lid-close-ac-action 'suspend'

 # Set suspend timeouts (adjust as necessary)
 # Suspend after 15 minutes on battery
 gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
 gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 900

 # Suspend after 30 minutes on AC power
 gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend'
 gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 1800

 # Ensure sufficient swap space
 adjust_swap

 # Configure GRUB for hibernation
 configure_grub_for_hibernation

 # Optional: Install and configure TLP for additional power management (for laptops)
 apt install -y tlp tlp-rdw
 systemctl enable tlp
 systemctl start tlp

 # Confirm changes
 echo "Suspend mode and hibernation configuration are complete. Please verify the settings."

 # Optional: Reboot to apply changes
 # Uncomment the next line if you want to reboot automatically
 # sudo reboot

 exit 0
	#!/bin/bash

	# This script configures suspend mode and prepares for hibernation on Ubuntu 24.04
	# It ensures swap space is sufficient and configures GRUB for proper resume settings

	# Check if the script is run as root or with sudo
	if [ "$(id -u)" -ne 0 ]; then
	echo "This script must be run as root or with sudo."
	exit 1
	fi

	# Function to check and adjust swap size
	adjust_swap() {
	local RAM_SIZE=$(free -m \| awk '/^Mem:/{print $2}')
	local SWAP_SIZE=$(free -m \| awk '/^Swap:/{print $2}')
	local SWAP_FILE="/swapfile"

	echo "RAM size: ${RAM_SIZE}MB"
	echo "Current swap size: ${SWAP_SIZE}MB"

	if [ "$SWAP_SIZE" -lt "$RAM_SIZE" ]; then
	echo "Current swap space is less than RAM size. Adjusting swap space..."
	# Disable and remove current swap file if it exists
	swapoff -a
	[ -f $SWAP_FILE ] && rm -f $SWAP_FILE

	# Create a new swap file with size equal to RAM size
	fallocate -l ${RAM_SIZE}M $SWAP_FILE
	chmod 600 $SWAP_FILE
	mkswap $SWAP_FILE
	swapon $SWAP_FILE

	# Add swap file entry to /etc/fstab if not already present
	if ! grep -q "$SWAP_FILE" /etc/fstab; then
	echo "$SWAP_FILE none swap sw 0 0" \| tee -a /etc/fstab
	fi

	echo "Swap space adjusted to ${RAM_SIZE}MB."
	else
	echo "Current swap space is sufficient."
	fi
	}

	# Function to configure GRUB for hibernation
	configure_grub_for_hibernation() {
	local SWAP_UUID=$(blkid -o value -s UUID $(findmnt -no SOURCE --target /swapfile))
	local RESUME_FILE=$(readlink -f /swapfile)
	local RESUME_OFFSET=$(filefrag -v $RESUME_FILE \| awk '/^ 0:/{print $4}' \| sed 's/\..//')

	echo "Configuring GRUB for hibernation with resume UUID $SWAP_UUID and offset $RESUME_OFFSET"

	# Add or update GRUB configuration
	sed -i.bak -r "s\|^(GRUB_CMDLINE_LINUX_DEFAULT=).*\|\1\"quiet splash resume=UUID=$SWAP_UUID resume_offset=$RESUME_OFFSET\"\|" /etc/default/grub

	# Update GRUB
	update-grub

	echo "GRUB configuration updated. Please verify the settings and reboot if necessary."
	}

	# Update and upgrade the system
	apt update && apt upgrade -y

	# Install necessary packages (if not already installed)
	apt install -y pm-utils

	# Enable suspend on lid close (for laptops)
	gsettings set org.gnome.settings-daemon.plugins.power lid-close-battery-action 'suspend'
	gsettings set org.gnome.settings-daemon.plugins.power lid-close-ac-action 'suspend'

	# Set suspend timeouts (adjust as necessary)
	# Suspend after 15 minutes on battery
	gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
	gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 900

	# Suspend after 30 minutes on AC power
	gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend'
	gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 1800

	# Ensure sufficient swap space
	adjust_swap

	# Configure GRUB for hibernation
	configure_grub_for_hibernation

	# Optional: Install and configure TLP for additional power management (for laptops)
	apt install -y tlp tlp-rdw
	systemctl enable tlp
	systemctl start tlp

	# Confirm changes
	echo "Suspend mode and hibernation configuration are complete. Please verify the settings."

	# Optional: Reboot to apply changes
	# Uncomment the next line if you want to reboot automatically
	# sudo reboot

	exit 0