Quoting tim hall <tech(a)glastonburymusic.org.uk>uk>:
Does anyone have any useful insights into why ardour
(0.99) so often
starts up
with no sound? - particularly if the last session was kicked out by jack
(0.100.7). When it works it will run for a whole session, but I am having
to
reboot a little too often to get sound back for my liking. Restarting
jack or
alsa alone does not usually sort this. I am at such a loss to know how to
debug this sort of problem
Sounds like a denormal issue. More on them on
http://www.ardour.org/node/139
Which plugins are you using in the session?
Sampo