Hibernate - Low-Power Mode for Optimus Laptops

Enhanced lid-functional low-power mode script for laptops with hybrid graphics (NVIDIA/AMD + integrated GPU), focused on energy efficiency and hardware longevity.

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Disclaimer

This code was tested on an ASUS Zephyrus G14 with Hyprland If you find issues (or missing dependencies) please let me know or make a pull request with your fix. My goal is to make an Optimus friendly linux environment for future users who may come across the same problems.

Features

• Automatic GPU Switching
  Switches from discrete GPU to integrated GPU on lid close for maximum power saving. Supports:

  • NVIDIA Optimus / PRIME setups
  • AMD hybrid graphics via vgaswitcheroo

• Adaptive CPU Power Management
  Optimizes CPU frequency and power settings based on CPU type:

  • AMD P-State support (energy_performance_preference)
  • Intel CPU governor management
  • Aggressive power saving when battery is low (<30%)

• Wireless & Bluetooth Management
  Saves and restores WiFi/Bluetooth state on lid close/open.

• Display & Backlight Control
  Turns off display and keyboard backlight safely using:

  • X11 DPMS
  • Wayland compositors (Hyprland, Sway)
  • Fallback: vbetool or minimum backlight

• USB and PCI Power Optimizations
  Autosuspends USB devices (excluding input/wireless devices) and configures PCIe/SATA/NVMe power policies.

• Screen Locking
  Automatically locks the user session when lid closes.

• Debounced Lid Detection
  Reduces false triggers with improved responsiveness.

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Installation Requirements

• Root privileges (script must run as root)
• cpupower package (for CPU governor management)
• nmcli (NetworkManager CLI)
• rfkill (optional, for Bluetooth management)
• supergfxctl (optional, for NVIDIA hybrid GPU control)
• vbetool (optional fallback for display control)
• Systemd for service management

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Installation

1. Copy script to a system path and make executable:

sudo cp lid-lowpower.sh /usr/local/bin/
sudo chmod +x /usr/local/bin/lid-lowpower.sh

Credits

This code was reviewed by Claude for debugging and adding comments! Hopefully that made my code more readable than it would be without, feel free to reach out if you have improvement ideas or questions!