[ardour-users] ardour timed ou

[Frode Haugsgjerd]

When i load ardour with 3-4 tracks and some LADSPA effects, like fast
overdrive,freeverb and DJ Flanger (guitar tracks), ardour tells me it
was too slow and that i have to save and restart.
Relevant Jackd log:
subgraph starting at ardour timed out (subgraph_wait_fd=17, status = 0,
state = Running)
client ardour error: awake_at = 1817455749 state = 2 timed_out = 

My system:
Current Debian Unstable
jackd          0.98.1-4
ardour-gtk     0.9beta17.1-2

Jackd invoked with  /usr/bin/jackstart -R -P5 -dalsa -dhw:0 -r44100
-p1024 -n2 -S -H -M
This setting yelds 46,4 msec latency :(
Tried many other combinations, no luck.

Vanilla 2.6.7 kernel w. realtime-lsm 0.1.1-2 and LD_ASSUME_KERNEL=2.4.19
Tried also Ingo's patch against 2.6.7-vanilla, 

WARNING! using the LD_ASSUME_KERNEL trick with this kernel wil bog down
your system, almost impossible to kill ardour from a tty. (but you
wizzards probably knew that)

HW:
Celleron 2,2 Ghz
512 Ram
Old SBLive! (1998)
Onboard SiS962 Sound (alsa snd_intel8x0)

I have read up on latency and tested my system with latency-graph-0.2
http://fsb.x86.no/~froh/div/test.gif
This test is while opening lots of heavy apps like Openoffice,
mozilla.., while copying a kerneltree to another partition and compiling
a 2.6.7 kernel. The load was well over 3 , an there was no audible
skipping in xmms playback while doing this test.

I have tested the latest nightly ardour build, and also tested with my
onboard SiS962 sound, to no avail.

Any help is greatly appreciated, 'cause Ardour is one killer app.

-- 
Frode Haugsgjerd <froh at fsb.gotdns.org>