Comment 4 for bug 586209

I managed to figure out a workaround. See my blog post here:

http://www.vladalexandruionescu.com/2013/01/using-your-guitar-or-other-instrument.html

(in particular the subheading "Some more hackery (fixing suspend)"). Though it's pretty specific to my setup.

But the idea is to have a script /etc/pm/sleep.d/00_restart-jack which stops Jack just before suspending (using 'jack_control stop')
and then starts it again (I do it via qjackctl) just after resuming.