A modern Linux GUI utility for monitoring and controlling CPU performance, power usage, and thermal behaviour. Built with a Rust backend and a sleek GTK4 interface styled with the full Dracula colour palette, it provides real-time insights into frequency scaling, governors, turbo boost, per-core temperatures, battery status, fan speed, and Intel RAPL power draw — all in one place.
Website: www.jegly.xyz
- System Overview dashboard — 4-column grid of live metric cards: Avg Frequency, CPU Usage, Temperature, Governor, Turbo Boost, Power Draw, Battery, Fan Speed
- 60-second CPU usage graph — Cairo-rendered area chart with Dracula purple fill
- Per-core status panel — every core shows: frequency, governor, usage bar, usage %, temperature, P-core / E-core label, online/offline toggle
- Intel hybrid CPU support — P-cores and E-cores handled gracefully; missing sysfs files are silently skipped
- Intel RAPL power draw — two-sample energy delta from
/sys/class/powercap/intel-rapl, updated every second - Battery status — charge %, AC/battery detection, live power draw in watts, charge status string
- Fan speed — first non-zero RPM from hwmon drivers
- Per-core temperatures — reads
coretemphwmon driver labels ("Core 0", "Core 1" …) - Critical temperature notifications — desktop notification when CPU exceeds a configurable threshold
- Frequency sliders — min/max sliders with Apply button; respects hardware limits
- AC / Battery auto-switch — detects power-source change every second and applies the configured profile automatically
- Profile quick-switcher — header popover for one-click switching
| Profile | Governor | Turbo | Best For |
|---|---|---|---|
| Performance | performance | Always on | Gaming, compilation |
| Balanced | schedutil | Auto | Daily productivity |
| Power Saver | powersave | Off | Battery life |
| Silent | powersave | Off, ≤2 GHz | Quiet operation |
- Custom profiles — create, name, and persist profiles; appear in all menus after restart
- Launch at Login — writes
~/.config/autostart/cpu-power-manager.desktop - Minimize to Tray on Close — hides the window instead of quitting
- Auto-Apply Profile on Startup — restores last used profile
- Critical Temperature Notification — toggle + configurable °C threshold
- Display Size — Small / Normal / Large / X-Large; scales the entire UI instantly without restart
- AC and Battery profile selection for auto-switching
- Status icon via StatusNotifierItem (pure-Rust
zbus, no C libdbus headers required) - Menu: Show/Hide Window and Quit
- Fails gracefully when no DBus session bus is available
- Full Dracula colour palette throughout — backgrounds, text, accents, status colours, graph, scrollbars
- macOS-style circular traffic-light buttons — Cairo-drawn 13 px dots (red/yellow/green) with hover dimming
- GTK4 + Rust — no Electron, no Python, small binary
- Responsive layout with scrollable per-core panel
- Linux kernel 4.4+ with
cpufreqsupport - GTK4 4.10+
- libadwaita 1.5+
- PolicyKit (for privilege escalation)
- Intel or AMD CPU with frequency scaling support
intel_pstate— Intel processors including 12th gen+ hybrid (P/E-core)amd_pstate— AMD processorsacpi-cpufreq— fallback for older systems
sudo dpkg -i cpu-power-manager_1.0.3_amd64.deb
sudo apt-get install -fDebian/Ubuntu dependencies (Trixie 13/Plucky Puffin 25.04):
sudo apt install build-essential cargo rustc libgtk-4-dev \
libadwaita-1-dev libglib2.0-dev pkg-config polkitdDebian/Ubuntu dependencies (Bookworm 12/Noble Numbat 24.04 LTS):
sudo apt install build-essential cargo rustc libgtk-4-dev \
libadwaita-1-dev libglib2.0-dev pkg-config policykit-1Fedora:
sudo dnf install gtk4-devel libadwaita-devel glib2-devel rust cargo pkgconfig polkitArch Linux:
sudo pacman -S base-devel rust gtk4 libadwaita pkgconf polkitgit clone https://github.com/jegly/cpu-power-manager.git
cd cpu-power-manager
cargo build --release
sudo cp target/release/cpu-power-manager /usr/local/bin/
sudo cp assets/cpu-power-manager.desktop /usr/share/applications/
sudo cp assets/com.cpupowermanager.policy /usr/share/polkit-1/actions/
sudo cp assets/icon.svg /usr/share/icons/hicolor/scalable/apps/cpu-power-manager.svg
sudo gtk-update-icon-cache /usr/share/icons/hicolor/cargo install cargo-deb
cargo deb
# Output: target/debian/cpu-power-manager_*.deb# GUI — requires root for frequency/governor writes
sudo -E cpu-power-manager
# Start minimised to tray
sudo -E cpu-power-manager --minimizedPass
-Etosudoto preserve yourDBUS_SESSION_BUS_ADDRESSso the system tray works correctly.
cpu-power-manager status
cpu-power-manager set-governor performance
cpu-power-manager set-frequency 3000
cpu-power-manager set-turbo true
cpu-power-manager apply-profile balanced
cpu-power-manager versionConfig file: ~/.config/cpu-power-manager/config.toml
[general]
auto_start = true
start_minimized = false
minimize_to_tray = false
auto_apply_on_startup = false
last_profile = "balanced"
critical_temp_notify = true
polling_interval_ms = 1000
temperature_unit = "celsius"
ui_scale = "normal" # small | normal | large | xlarge
[auto_tune]
enabled = true
ac_profile = "performance"
battery_profile = "balanced"
temp_threshold_high = 80
temp_threshold_low = 60
load_threshold_high = 70
load_threshold_low = 30
[thermal]
max_temp_celsius = 90
emergency_temp_celsius = 95
[monitoring]
enable_graphs = true
graph_history_seconds = 300
show_per_core_stats = trueCan't change frequency/governor — run with sudo -E and verify the cpufreq driver is loaded:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driverSystem tray not appearing — run with sudo -E to preserve DBUS_SESSION_BUS_ADDRESS.
Temperature not showing — install lm-sensors and run sudo sensors-detect.
E-core frequencies showing 0 MHz — expected on Intel 12th gen+ hybrid CPUs; E-cores share a policy group and don't expose individual scaling_cur_freq files.
- GPU frequency monitoring
- Fan curve control
- Profile import/export
- Integration with
power-profiles-daemon
- Dracula Theme — draculatheme.com
- Inspired by auto-cpufreq and Watt
- GTK4 and libadwaita by GNOME
GNU General Public License v3.0 — see LICENSE for details.
Note: Changing CPU frequencies and governors requires root privileges. Use with care.