On Fri, Feb 6, 2009 at 8:18 PM, Robert Jonsson <spamatica(a)gmail.com> wrote:
Thinking back I realize that I stumbled on this
problem on the last rebuild
some years ago but ended up running single core without investigating why
this was.
The symptom sounds rather like the infamous old AMD64 non-monotonic
clock resulting from clocks not being properly synchronised across
cores. But I had thought that workarounds in the kernel, JACK, or
both had made this a non-issue for most systems installed in the last
couple of years. (I am quite sure that a workaround dedicated to
solving specifically this problem was merged to JACK trunk quite a
number of releases ago, and any contemporary JACK release will have
it.)
This page:
http://www.sound-man.co.uk/linuxaudio/kernel.html refers to
the problem.
I realise I'm not offering any solution here, just pointing out that
your problem sounds the same as this one.
Chris