[LAU] Lexicon Lambda USB - are my lockups due to the hardware or software?

[Antony Gelberg]

Thanks for letting me know. I'm running at 24 bit 48Khz now, but no
difference in the lockups. I have noticed that the lockups seem to *start*
when I do something that might cause a bit of processor / disk IO e.g.
change to a different program, maximize a window, etc, then they carry on
for an unspecified time until normal service is resumed.

Perhaps this could be an interrupt issue? Although it (from memory) only
happens when jack(dbus) is also running, so maybe it's an interaction. I've
just stopped jack and restarted pulseaudio (when Jack stopped, my
Pulseaudio was full of artefacts - that's new), and I'll see how it goes
for the rest of the evening.

In any event, I've just ordered a new interface with SPDIF (Behringer
UMC1820), but it would still be great to get to the bottom of this issue
with the Lambda. Perhaps it's not hardware-specific, I guess I'll know for
sure when the new interface comes, if I don't fix the issue by then.

On 14 April 2017 at 21:15, Chris Caudle <chris at chriscaudle.org> wrote:

> On Tue, April 11, 2017 9:11 am, Antony Gelberg wrote:
> > I also noticed when starting jack:
> > Apr 10 11:46:50 cubase pulseaudio[23745]: [pulseaudio]
> module-jack-sink.c:
> > JACK error >Cannot use real-time scheduling (RR/5)(1: Operation not
> > permitted)<
> > Apr 10 11:46:50 cubase pulseaudio[23745]: [pulseaudio]
> module-jack-sink.c:
> > JACK error >JackClient::AcquireSelfRealTime error<
> >
> > Although qjackctl reports that jackd *does* run with realtime scheduling.
>
> I just checked my system log when loading the jack-sink module and noticed
> the same thing:
> pulseaudio[30057]: [pulseaudio] module-jack-sink.c: JACK error >Cannot use
> real-time scheduling (RR/15)(1: Operation not permitted)<
> pulseaudio[30057]: [pulseaudio] module-jack-sink.c: JACK error
> >JackClient::AcquireSelfRealTime error
>
> It doesn't seem to cause any problems, I  just played a couple of youtube
> videos with no underruns.
>
>
> --
> Chris Caudle
>
>
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