That might be part of it. I run a dual core 64bit
machine and have 4G
memory. I also use it ONLY for music. Internet and office stuff are
all done on a cheap general purpose machine.
What Jack settings do you use?
Mostly the default settings. For just Rosegarden and Zyn. I set 64
frames / period which gives a latency of 2.9mS, if I've got a lot of
other stuff running as well, or if I'm using the most complex patches I
go up to 128 frames / period, which is 5.8mS.
On very rare occasions I have to go up to 11.6mS - this is what I had
to have most of the time with Zyn 2.2.1, although then it was zombies
that were the main problem rather than xruns :(
I just tested yoshimi on Ubuntu 9.10, wow that performs 1000x better
then on my Debian testing box. This is good and bad news...
How to find out what is wrong on my system? Other apps like Ardour and
Hydrogen seems to work well...
I got these xrun messages:
Jack reports xrun
Jack reports error: JackActivationCount::Signal value = 0 ref = 3
\r