Ubuntu
qjackctl package

  1. Bug #398209
  2. Comment #3

Comment 3 for bug 398209

Revision history for this message
raboof (arnouten) wrote : Re: Rosegarden does not play midi: Jack error

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).