Re: [linux-audio-user] Latency problems with MAudio 24/96

From: Them <idragosani@email-addr-hidden>
Date: Wed Mar 09 2005 - 15:11:52 EET

Bill Allen<lau@email-addr-hidden> wrote:
> I'm having really bad xrun problems in jack with my MAudio 24/96 card. I
> can't find any setting that doesn't result in 10's of xruns every few
> minutes which is obviously unacceptable. The latency doc in the linux
> audio users page at
> http://www.djcj.org/LAU/guide/Low_latency-Mini-HOWTO.php3 points out that
> most soundcards want to have an IRQ of 9, 10 or 11. When I cat
> /proc/interrupts (below), it appears that my card is at IRQ 19 which as I
> understand it puts it behind just about everything. Could that
> be the root of my xrun problem? If so, how can I make the card be on
> another interrupt.
>
> Regards,
> Bill
>
> cat /proc/interrupts
> CPU0
> 0: 738208 IO-APIC-edge timer
> 1: 379 IO-APIC-edge i8042
> 2: 0 XT-PIC cascade
> 8: 0 IO-APIC-edge rtc
> 9: 0 IO-APIC-level acpi
> 12: 24226 IO-APIC-edge i8042
> 14: 71993 IO-APIC-edge ide2
> 15: 20598 IO-APIC-edge ide3
> 16: 43548 IO-APIC-level ohci1394, nvidia
> 17: 2157 IO-APIC-level SysKonnect SK-98xx
> 18: 0 IO-APIC-level libata
> 19: 177 IO-APIC-level ICE1712
> 21: 0 IO-APIC-level uhci_hcd, uhci_hcd, uhci_hcd, uhci_hcd,
> ehci_hcd

That wouldn't cause xruns, AFAIK.

What else do you have running on this machine. in terms of btoh software
and hardware?

What kernel are you using? Does it support low latency/realtime (either
a patched 2.4 kernel or a newer 2.6 kernel)?

How are you starting jack?

-- Brett
Received on Wed Mar 9 16:15:06 2005

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