Ardour crashing with error about not being fast enough.

[Khashayar Naderehvandi]

On Fri, Jan 30, 2009 at 2:01 AM, Brian Bergstrom
<boilingbergstrom at gmail.com> wrote:
> I have a project that I was working on in 2.3 and I started getting this
> error.
>
> JACK has either been shutdown or it
> disconnected Ardour because Ardour
> was not fast enough. Try to restart
> JACK, reconnect and save the session.
>
> It got the point where I couldn't work on the project anymore. I could open
> the project and playback my song, but as soon as I stopped playback that
> message would pop up and JACK would get Xruns. My session isn't
> extroidinary, it has 7 drum tracks that I recorded from Hydrogen, 2 guitar
> tracks and a bus. It has 7 effects running which doesn't seem like a lot
> since I have run more effects in Abelton Live and Adobe Audition before.
> I investigated and tried to make sure my system was tweaked correctly. I am
> running Ubuntu Studio Hardy with real time kernel 2.26.24. I have my audio
> group setup in the limits file with unlimited memlock. My system has a
> 1.8GHz Core Duo and 2GB of ram. I don't have any hefty daemons/processes
> running. I am using a Edirol UA-4fx USB audio interface. I have jack setup
> with 128 frames and 3 periods. I got the same results when I turned the
> frames up to 1024. Ardour plays/records fine in a new session with just a
> few tracks. Other audio apps work fine with Jack. I built .116 jack and 2.7
> Ardour from source with optimize flags and still get the same result. My
> hard drive is running in udma6 mode and gets 900MB/sec cached read and
> 40MB/sec buffered disk read. I have run the realTimeConfigQuickScan.pl from
> http://wiki.linuxmusicians.com and all checks are good. I am out of ideas
> and just want to make music, any help is greatly appreciated.
>
It really does sound like you've tried next to everything.
The only thing I can think of that you don't explicitly mention is to
try new versions of ardour + jack without optimization flags (as
optimization flags might cause instabilities). Also, perhaps try with
updated alsa?

Regards,
Khash.