Running qjackctl is absolutely not a suitable solution to this problem. The root of your problem is this:
cannot use real-time scheduling (FIFO at priority 10) [for thread -1211020544, from thread -1211020544] (1: Operation not permitted) JACK is configured to use 'Realtime' mode, but your system is not configured to allow you to use Realtime mode. http://trac.jackaudio.org/wiki/Troubleshooting explains how to troubleshoot this problem - though I believe starting from Karmic this is fixed in the default configuration (not sure). ** Summary changed: - Rosegarden does not play midi: Jack error + Jack fails to start in real-time mode -- Jack fails to start in real-time mode https://bugs.launchpad.net/bugs/398209 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs