DDC/CI Monitor Brightness

by andr35

Score 4

Issues Website Download

UUID: ddcci-monitor-control@andr35

Last edited:

3 years ago 2021-02-21, 16:34

Last commit: [b3204d46] ddcci-monitor-control@andr35: update applet icon name (#3613)

Adjust external monitor brightness and contrast

README

DDC/CI Monitor Brightness

A Cinnamon applet that let adjust brightness and contrast of external an monitor thanks to the DCC/CI channel.

Requirements

In order to function correctly this applet requires ddcutil.

It can be installed following these steps:

Install ddcutil and i2c-tools using:
```
sudo apt install ddcutil i2c-tools
```
To let ddcutil work without requiring root priviledges, the user must be part of the i2c group. Run the following command to add the current user to the i2c group.
```
sudo usermod -aG i2c $USER
```
After having executed the command, log out to apply the new configuration.

More information on how to install ddcutil can be found here in section "Tool 2".

You can check if ddcutil has been installed correctly and the monitor supports the DDC/CI protocol running:

ddcutil capabilities

Log In To Comment!

5 Comments

Ivelin Banchev-2 weeks ago

Did not work for me. Setup: - Ryzen 7 8845HS with 2x USB type C 3.2 gen 1 - 2xDell monitors daisy-chained + primary one connected to the first USB C port, which also charges the laptop - 1xArzopa monitor directly to the second USB C port, which also powers the monitor

northcamel-1 month ago

Linux Mint 22, Panasonic SV7 through Thunderbolt 3, LG UltraFine 24 inch 4K works.

Wolfs01-1 year ago

Very nice! Though I had to restart to add my user to i2c, relogging didn't suffice

Herpderpus666-4 years ago

Kinda works, but the icon is missing on my Linux Mint 20. Also, the contrast slider appears and disappears making it a bit hard to use.

Andr35-4 years ago

The slider disappears when the applet asks for the current brightness and contrast values to the monitor. This operation might take a while. Unfortunately, during this period of time I noticed that it is not possible to set a new brightness/contrast value. So, the slider is temporarily hidden.