Comment 11 for bug 360590

Huh, it turns out that jack support was intentionally disabled in Ubuntu:
http://launchpadlibrarian.net/22657643/portaudio19_19%2Bsvn20071207-0ubuntu5_19%2Bsvn20071207-0ubuntu6.diff.gz

Because jack is not in main, portaudio cannot depend on it. How can this be resolved?