Re: [LAU] Realtime, but many xruns when jack is started. Debian Etch

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To: Rui Nuno Capela <rncbc@...>
Cc: <linux-audio-user@...>
Date: Sunday, October 7, 2007 - 5:12 pm

On Sunday 07 October 2007 17:37, Rui Nuno Capela wrote:

Unfortunately that option is a no go, as I've got about 14 distros that run on
this machine, and don't want to mess with the placement of the cards, just in
case.

That's not ideal either, as it's better for me that snd-emu10k1 is indexed as
0. snd-bt87x is already notorious for grabbing card0, along with some other
uncooperative drivers, and as I don't need audio capture from the TV card, I
could send it to /bin/true, along with ohci1394, as.
install snd-bt87x /bin/true
install ohci1394 /bin/true

That still leaves bttv0 though, and as it is using /dev/video0, I cannot set
an indexing option for it.

As I've had so many problems getting realtime setup, I think I'll go for the
rtirq script hack, and will probably learn a bit more on how the script
works.

btw: Running /etc/rc.d/init.d/rtirq status on Fedora 7 shows IRQ-10 sharing
the stuff from IRQ-9 above, with emu10k1, and I'm getting xruns about every
6m 25secs with jackd started.

/etc/rc.d/init.d/rtirq status

PID CLS RTPRIO NI PRI %CPU STAT COMMAND
890 FF 80 - 120 0.0 S< IRQ-8 rtc0
920 FF 75 - 115 0.1 S< IRQ-10 ohci1394, bttv0, Bt87x audio,
EMU10K1
60 FF 70 - 110 0.0 S< IRQ-11 acpi, uhci_hcd:usb1,
uhci_hcd:usb2, eth0
285 FF 65 - 105 0.0 S< IRQ-1 i8042
284 FF 64 - 104 0.0 S< IRQ-12 i8042
5 FF 50 - 90 0.0 S< softirq-high/0
6 FF 50 - 90 0.3 S< softirq-timer/0
7 FF 50 - 90 0.0 S< softirq-net-tx/
8 FF 50 - 90 0.0 S< softirq-net-rx/
9 FF 50 - 90 0.0 S< softirq-block/0
10 FF 50 - 90 0.0 S< softirq-tasklet
11 FF 50 - 90 0.0 S< softirq-sched/0
12 FF 50 - 90 0.0 S< softirq-hrtimer
13 FF 50 - 90 0.0 S< softirq-rcu/0
324 FF 50 - 90 0.0 S< IRQ-14 libata
325 FF 50 - 90 0.0 S< IRQ-15 libata
674 FF 50 - 90 0.0 S< IRQ-6 floppy
895 FF 50 - 90 0.0 S< IRQ-7 parport0

The TV card using bttv has been very hit and miss on which IRQ is used. On
some distros it is IRQ-10, on others IRQ-9. A bit confusing, but once set up
it appears to use the same IRQ everytime on the different distros.

Thanks for your reply Rui.

Nigel.

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Messages in current thread:
[LAU] 65 Studio and debian-multimedia.org, Dave Phillips, (Fri Nov 30, 11:53 am)
Re: [LAU] 65 Studio and debian-multimedia.org, Diseño treees, (Fri Nov 30, 12:19 pm)
Re: [LAU] 65 Studio and debian-multimedia.org, Mark Constable, (Fri Nov 30, 12:49 pm)
Re: [LAU] 65 Studio and debian-multimedia.org, Lars Luthman, (Fri Nov 30, 12:28 pm)
Re: [LAU] Realtime, but many xruns when jack is started. Deb..., Marcos Guglielmetti, (Mon Oct 1, 4:45 am)
Re: [LAU] Realtime, but many xruns when jack is started. Deb..., Marcos Guglielmetti, (Mon Oct 1, 10:34 pm)
Re: [LAU] Realtime, but many xruns when jack is started. Deb..., Nigel Henry, (Sun Oct 7, 5:12 pm)