[ardour-users] ardour timed ou

Frode Haugsgjerd skrot at fsb.x86.no
Sat Jul 10 15:15:29 PDT 2004

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)

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
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>

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