Q Light Controller+

Posted: **Mon Mar 07, 2016 6:34 pm**

Hello,
Recently I bought Eurolite USB DMX512 PRO, first I tried to connect device with win 10 OS, then I discovered that it only runs with linux. So I tried with Ubuntu 14.04 64-bit device shows in Input/Output panel but when I select it I get this error:
"An error occurred while trying to open the selected device line.
This can be caused either by a wrong system configuration or an unsupported input/output mode.
Please refer to the plugins documentation to troubleshoot this.".

Thanks for your help.

Posted: **Tue Mar 08, 2016 8:34 am**

Hi, make sure your user have the rights to write on the device.
Typically it should be /dev/ttyACM0

you can try this from a terminal:

Code: Select all

echo "foo" > /dev/ttyACM0

and see what happens.

Most likely you need to add your user to the 'dialout' group or kill the ModemManager which is an annoying service of Ubuntu blocking every "modem related" device

Posted: **Tue Mar 08, 2016 6:16 pm**

Thanks for help, I had problems with user permissions.

Posted: **Thu Apr 26, 2018 12:21 pm**

Here some additional infos on troubleshooting this ,,,,

Note: The dmesg linux command should display your device.

You may need udev rules to allow access.

Use your favorite editor and add a new udev rule

Code: Select all

sudo mcedit /etc/udev/rules.d/50-myusb.rules

Allow all users access by adding these rules:

Code: Select all

KERNEL=="ttyUSB[0-9]*",MODE="0666"
KERNEL=="ttyACM[0-9]*",MODE="0666"

Note: add-user syntax for adding user dialout

Code: Select all

sudo usermod -a -G dialout YOUR_USER

Note: stopping modem manager

Code: Select all

sudo systemctl stop ModemManager
sudo systemctl disable Modemmanager

Q Light Controller+

[SOLVED] Linux - Eurolite USB DMX512 PRO

[SOLVED] Linux - Eurolite USB DMX512 PRO

Re: Eurolite USB DMX512 PRO

Re: Eurolite USB DMX512 PRO

Re: [SOLVED] Linux - Eurolite USB DMX512 PRO