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Setting up g15daemon on a Logitech G15 keyboard under Manjaro

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I have a Logitech G15 keyboard which has an LCD screen built into the top of it. Under Ubuntu, getting it to work is a simple matter of running

apt install g15daemon

Under Manjaro, it's a bit different. I can install the g15daemon but it won't start automatically without requring the root password. What we need to do is use a tool called visudo. This is what I did.

sudo visudo

Then go to the bottom of the file, press o to insert and put:

ALL ALL= NOPASSWD: /usr/sbin/g15daemon

Press escape, then :x to save and quit.

Now we enable it as a service in systemctl

sudo systemctl enable g15daemon

And test it by running

sudo systemctl start g15daemon

The LCD on the keyboard now shows me the time and date. To get this to start when I log in, because I'm using Manjaro XFCE I will open "Session and Startup", go to the "Application Autostart" tab and create a new entry with "sudo systemctl start g15daemon" as the command to run, giving it a suitable name.

After a reboot to test it, it's all working!

I originally followed this post on the Manjaro forums with no success, I found my way to be much cleaner.