I just compiled a vanilla kernel 2.6.15.4 in my G3 powerpc. Also I
compiled, installed and loaded the realtime-lsm module and I started
to play with jackd -R and some jack enabled applications.
If I start jackd without realtime, everything runs nicely, of course
with some xruns when I switch windows, manipulate GUIs and such. This
is more or less what I expected.
But then I run jackd realtime using qjackctl. I start amsynth and it
takes a bit longer to load but then runs without a mess. Sound is
clean, no artifacts, no xruns.
Then I try horgand. It takes a lot for it to load, then it sounds
nicely, I get no xruns, but my X Window system becomes unresponsive.
Later I try zynaddsubfx. It takes half an hour to open, and then it
kills qjackctl, leaving the jack server running. Meanwhile top shows
that zynaddsubfx is taking 35% of memory, and qjackctl and jackd 25%
each.
Could this be an issue with the applications, with the kernel, with
the realtime-lsm module, with priority of my X Window session?
I must insist this only happens when jackd is run with the -R option.
Is it true that realtime-lsm is deprecated? How do I enable realtime
preemption on a 2.6.15?
Any ideas welcome.
Cordially, Ismael
--
Dropping science like when Galileo dropped his orange
http://lamediahostia.blogspot.com/
http://www.flickr.com/photos/ivalladt/
