Hi,

    recently something weird happened. As usual in this cases, I'm not aware of making any changes, this happened all without my intervention. This reinforces my theory of a leprechaun infestation at home, but I'll leave that for another mailing list.

    The symptoms: I launch qjackctl, start jackd, and then hydrogen. When I hit "play", there is no sound. There are no errors in qjackctl's message window, and hydrogen is playing nicely (vu meters are going up and down as if nothing happened).

    After messing around for a while, I found that I could make hydrogen sound again changing the connections in qjackctl "Connections" window: instead of connecting the two outputs of hydrogen to "playback_1" and "playback_2" (which is the default as soon as hydrogen is started), I connected them to "playback_7" and "playback_8". I have a built-in HDA-intel sound card, and I believe that these outputs are "side-left" and "side-right". But I had never had to do this, playback_1 and playback_2 always worked. I'm using headphones, in case that's important.