Am Montag, 17. Dezember 2007 schrieb Raphael Bollen:
Hi Everyone,
I'm struggling to transform a Thinkpad T60 into a decent audio system. I've
installed ubuntu studio Feisty and a realtime kernel from texware.it. When I run jack in
realtime mode using for
example 512 frames/period, it shows in its messages a lot
(>10/sec) late driver wakeup warnings and does a lot of xruns (>1/sec). I've
changed the IRQ priority of the sound card (an HDA intel) to
realtime but this does not change the warnings/xruns. It's not the first time I setup
a computer for audio and so far succeded using 64 frames/period. Here I tried every
settings I could
(periods/buffer, samplerate, even tried with a Maudio Fast track pro) but still no joy.
This Thinkpad has an ATI graphic card (not on the same IRQ as the sound card) and uses
fglrx driver. Could this be the culprit? Is there another (free) driver I could use? Does
anyone have an
idea of what to try next?
Maybe this helps:
Using a 2.6.24-rc5 kernel with jackd @builtin hda intel soundcard:
$ jackd -t100 -RP 80 -d alsa -d hw:0 -p128 -n3
The -t100 and the -n3 took me some time to find out.
With em the only thing noticed so far to stall jackd was $ lsusb.
Karsten