Linux-Screen-Dimmer 🌙 🖥️ 💻

Linux Screen Dimmer is a simple script, created using python and subprocess library, which automates screen dimming. The script uses the xrandr command-line tool, so you can decrease brightness even if your slidebar in power management settings is already set to the minimum level.

Prerequisites ⚙️

• Python 3
• xrandr command-line tool

Usage 🔅

You can use it via terminal...

python3 ScreenDimmer.py

python3 /path_to_script/ScreenDimmer.py

but I recommend creating a keyboard shortcut...

or creating launcher attached to the panel.

Default values 🛠️

BRIGHTNESS_VALUES = [0.3, 0.5, 0.7, 0.87, 1.0]
MONITOR_NAMES = get_monitor_names()
SAME_BRIGHTNESS_FOR_ALL_MONITORS = True
MIN_BRIGHTNESS_LVL = 0.3
MAX_BRIGHTNESS_LVL = 1.0

To set interesting you brightness values modify the BRIGHTNESS_VALUES array. Note that these values are limited by MIN_BRIGHTNESS_LVL and MAX_BRIGHTNESS_LVL. If you want to always set the same brightness level for all monitors, keep SAME_BRIGHTNESS_FOR_ALL_MONITORS set to True otherwise change it to False. The monitors whose brightness will be modified by the script are defined in MONITOR_NAMES and by default this array contains all the monitors aveliable via xrandr --listmonitors. If you want to use this script only for selected monitors, you should list them in this array, example:

MONITOR_NAMES = ["eDP", "HDMI-0"]

MoleSavior 💡

Using redshift in auto mode with ScreenDimmer may couse the screen to start blinking. To solve this problem, you can use MoleSavior.py. This script uses redshift to adjust the color temperature of displays.

• You can run it via the console (python3 MoleSavior.py) or through launcher as it was shown above.
• The default temperature is set to 6500K
• The default list of temperatures is as follows: TEMPS = [5000, 4000, 3000, 2500]. You should adjust this list to your preferences.
• You can install redshift using the following command sudo apt-get install redshift (You don't need the redshift GUI - redshift-gtk).

Caution ⚠️

• It's essential to have proper permissions to modify monitor settings using xrandr.
• Be careful when setting brightness levels, as extremely low brightness levels may result in a black screen or make the monitor barely visible.
• The scripts have only been tested on Linux Mint 21.2.

License 📄

MIT License