DDC/CI Multi-Monitor

by tim-we

Score 6

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UUID: ddcci-multi-monitor@tim-we

Last edited:

4 days ago 2024-04-21, 12:53

Last commit: [579bbe01] ddcci-multi-monitor@tim-we: Added changing brightness on scrolling applet icon (#5673)

Adjust monitor brightness via DDC/CI

README

DDC/CI Multi-Monitor

A Cinnamon applet that lets you adjust brightness of external monitors via DDC/CI.

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

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1 Comments

sta777ic-2 months ago

Followed directions but still got error. Fix/solution shown below. ~$ sudo apt install ddcutil i2c-tools [sudo] password for : Reading package lists... Done Building dependency tree... Done Reading state information... Done ddcutil is already the newest version (1.4.1-1). i2c-tools is already the newest version (4.3-2+b3). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. ~$ sudo usermod -aG i2c $USER ~$ ddcutil capabilities No /dev/i2c devices exist. ddcutil requires module i2c-dev. Solution, Do these 2 extra steps as root, add i2c-dev into the /etc/modules-load.d/modules.conf modprobe i2c-dev