[linux-audio-dev] Re: [Jackit-devel] =?ISO-8859-1?Q?2=2E4=2E20-rc1=C2?=Â + lowlat +preempt + alsa + jack = deadcomputer

[Eric Dantan Rzewnicki]

Fernando Pablo Lopez-Lezcano wrote:
> 
> > > > > Have you tried anything in between pre10-ac3 and pre4? I know pre4 works
> > > > > fine. I probably should post to the lkml with as much detail as we can
> > > > > get (unless some kernel hacker is actually reading these messages).
> > > >
> > > > I've tried every kernel from 2.4.20-pre5 up to 2.4.20-pre10, and again
> > > > 2.4.20-pre10-ac3, which caused a lockup on my system in the past, this
> > > > afternoon. And I couldn't reproduce even _one_ lockup. I use another IDE
> > > > interface though: a cmd649 add-on controller. The lockups happened with
> > > > the onboard IDE interface (VIA KT333 chipset, vt8235 southbridge).
> > >
> > > To add one more datapoint to the thread and (apparently good news): I'm
> > > testing 2.4.20 (final) + lowlat + preempt + acpi + alsa + jack and the
> > > computer seems to be chugging along nicely. This is with today's alsa. A
> > > slighly older alsa did lock the computer after 5 or so minutes of jack
> > > activity but I managed to reboot it with the sysrq magic key. With the
> > > newest alsa I got jack + freqtweak + ams (with the demo patch) running
> > > for 50 minutes until for some reason jack died due to a watchdog
> > > interrupt. Not bad.
> >
> > Where are the lowlat and preempt patches for 2.4.20?
> 
> Not on the net at this point. I have been hand tweaking the originals to
> patch cleanly (trying to fix the failing chunks).

Ah, i see.

> I can email them to
> you, use at your own risk :-)

no. no need for that. i'm not so brave. :)

> 
> BTW, results in my current tests are inconclusive, a couple of times I
> managed to freeze the machine soon after I started just jackd and
> qjackconnect. I'm currently trying to see if I can stat the stuff from
> the text console so that I can try to catch some register dumps through
> the sysrq magic key...

Thanks for your efforts.

> 
> -- Fernando

-ERic