I was on the Gutsy Gibbons for 4 months and used my soundcard Edirol FA101.
It worked quite good, even if, when using jack and 3 softwares at the same time it crashed (buffer under or overrun). It wasn't really stable but it worked.
I made the update to Hardy Heron and now it works only for a short time (even with hydrogen only) and if I use only 2 softs it crashes.
The message from Qjackctl :
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK compiled with System V SHM support.
loading driver ..
Freebob using Firewire port 0, node -1
libiec61883 warning: Established connection on channel 0.
You may need to manually set the channel on the receiving node.
libiec61883 warning: Established connection on channel 1.
You may need to manually set the channel on the transmitting node.
LibFreeBoB ERR: SLAVE XMT : Buffer underrun! 512 (0 / 352) (0 / 0 )
LibFreeBoB ERR: Xrun on connection 1
For example. And when I use 2 softs this is almost the same but written: buffer overrun
I made the real-time improvement, schedule, priority and co but it's just the same!
I have a laptop with intel core 2 duo and 1024 RAM so I think it's not a hardware problem.
I'm using Linux (before Ubuntu I was on Mandriva) and Qjackctl to make music for 3 years and this problem right now is just weird regarding the abilities of my computer.
I'd really appreciate some help, I really need to make my audio softs work well.