Adding chmod script to startup Manjaro KDE (Ambilight CHMOD)

Support
1

Hi there,
I am quite new to Manjaro. I have Ambilight lighting system but it only starts once I run “sudo chmod 777 /dev/ttyUSB0”.
I want to know how to run an autoscript for this command to run at startup.

Thank you.
Paul

2

Hello,

Not quite sure why you want to do that. AFAIK hyperion package does provide some ambilight functionality … but probably best is to use the hyperion.ng-git package from AUR.

You can run from terminal:
pamac build hyperion.ng-git

For this part i rather recommend this, and should be straight forward:

3

Make a systemd unit like the following:

[Unit]
Description=Change chmod on /dev/ttyUSB0
After=multi-user.target

[Service]
Type=simple
ExecStart=/usr/bin/chmod 777 /dev/ttyUSB0

[Install]
WantedBy=multi-user.target

Make/save it, eg, as /etc/systemd/system/set-chmod.service

Then: systemctl daemon-reload and systemctl enable --now set-chmod.service: will start on every system startup; you can also manually execute it:
systemctl start set-chmod.service

4

Thank you very much Dave, this solved my problem and it was straight to the point.

5

I have tried installing Hyperion however I am not sure it has a GUI since I haven’t been able to run it. I installed all dependencies but I just don’t know how to run it.

6

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