Q Light Controller+

Hi everybody,

I use QLC+ on a RPi 3 model with latest Debian distribution and latest QLC+ version (error was present at previous one also). There are also 4 MIDI controllers I use for live shows, a Korg NanoKontrol, a Korg NanoKontrol2, a Koreg NanoKey and a Novation Launchpad. They are attached to a USB hub and not directly to the RPi to avoid problems with current.
I have programmed a few shows I use often, and in every show I use the same 4 MIDI controllers, but there's one show where the Novation Launchpad doesn't work anymore when I load the show. Other shows I load after the Launchpad doesn't work either.
In the Linux console the Launchpad is present all the time, there's nothing strange I could find in the system, there must be something wrong with this show. How can I find it out?

Thank you very much!!!

I'd start looking if the different devices are properly adressed (midi-channels)
then I'd check if the troublesome launchpad does send anything (midi-sniffer) [mode?]
and only then QLC+ comes into play ...

If you are not sure anything is sent over the wires you cannot blame QLC+ not working.

Hi GGGs,

thank you for your answer.
You have to know I'm using QLC+ for about 2 years now, so I have a little bit of experience with this program. As sysadmin I also know linux systems very well.
The 4 devices work on 3 different MIDI channels, and the Launchpad "shares" channel 1 with another device, but QLC+ handles them as different ones anyway, so there should be no problem. I tried monitoring the Launchpad with midisnoop, and the device is sending correct notes... until I load a project after the initial one. After that the Launchpad does not send anymore anything.
Same thing on my 2 QLC+ installations (one is Massimo's QLC+ image, the other one is a normal Debian with QLC+).
I discovered that on the autostart-project every MIDI device workes properly, also this one I use so often. So at the moment I use as workaround to set the project I need as autostart project.
But it's enough to load the autostart project again and the Launchpad stops working.
For me this doesn't sound like a system problem but like a QLC+ issue.
The Launchpad is also used on various other (Windows + Linux) workstations, and there we don't have any problem.

Any idea?

Thank you!

Oke I see - so not soo novice after all

Did you check if QLC+ is sending the correct init-strings to the launchpad? Since they are sharing channel 1? Maybe there is a clue??