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-   -   Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 ( R: Audio issues in 10.04) (http://www.linux-archive.org/ubuntu-studio-user/705312-horrific-jackd-xrun-behaviour-after-upgrade-us-10-04-12-04-r-audio-issues-10-04-a.html)

Thomas Orgis 09-18-2012 11:05 PM

Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 ( R: Audio issues in 10.04)
 
Am Tue, 18 Sep 2012 12:50:32 +0200
schrieb Thomas Orgis <thomas-forum@orgis.org>:

> And, having read up a bit ... AHCI seems to be known to cause audio
> issues

I must admit that the box seems to be stable now. And it is always
using AHCI enforced via kernel, regardless of BIOS setting. So that is
ruled out as source of the issues. The onboard soundchip performance is
still not stellar, but it is able to do 2x1024 in an apparently stable
manner. What matters, is the Edirol FA-101 on Firewire and there, I can
happily record with 3x64 if I really want to. My standard setup of 3x512
periods was idling around (jack and meterbridge running) over the whole
day and did not experience a single xrun.

I still added the rtc setting to rtirq, which didn't change anything I
could perceive. I also swapped the firewire card back into its previous
slot. No difference, still fine.

I have to conclude that this really is about either a BIOS setting (I
didn't do that much ... could disabling the internal audio chip trip
things up?!) that got reset when I took out the battery or that indeed,
the flaky power train triggered unstable behaviour of the machine;
which would confoundedly confuse me as I would expect a more drastic
failure mode.

Thanks for jumping to help me about this ... I'll keep an eye on this
box and report if I find a definite clue. For now, I'll try to just use
it, not waste time breaking the setup again. I hope you can understand
that;-)


Alrighty then,

Thomas
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