Sending bus output to another bus input, but the receiving bus gets no signal/audio.

I've tried both methods, using the Qtractor connections window and also through the qpwgraph.

Currently, I'm using OpenSUSE Tumbleweed with KDE Plasma and X11.

I have Qtractor installed from the Geekos DAW multimedia:proaudio repository. The Qtractor version is 1.5.4, using Qt 6.9.0.

The issue is that when I send the output of one bus to another bus, the receiving bus gets no signal at all.

Apologies for my poor English. I'll try to explain as clearly as I can.

I have two audio tracks: Track 1 and Track 2. There’s also the default Master Bus. I’ve created a bus called "MixBus," along with Bus 1 and Bus 2.

Now, if I send Track 1 to Bus 1 with auto-connect enabled, Bus 1 sends the signal to the playback device, and I can hear everything.

However, if I disconnect Bus 1 from the playback device and try to connect it to another bus, which then routes to the output, the signal doesn’t pass through. The meter doesn’t show any activity, and no audio goes through.

For example, if I route Track 1 to Bus 1, Bus 1 to MixBus, and then MixBus to the playback device, I can’t hear anything. The problem is that there’s no signal showing up in the MixBus meter; it shows no activity. Despite connecting Bus 1 output 1/2 to MixBus input 1/2, and then sending MixBus output 1/2 to the playback device, there’s no signal.

I believe this issue also affects MIDI tracks. When I right-click and change the audio output to a bus, I face the same problem.

The bus receiving input directly from a track does show signal, and I can see the green volume meter activity on the bus’s meter. The issue seems to be that the signal isn’t passing from bus to bus.

I think OpenSUSE is using PipeWire with JACK.