How do I sort IRQ conflicts to fix broken audio?

  Olly_jb 16:45 12 Aug 07
Locked

Since installing a PCI Wireless Network adapter (the Netgear WN311B), I have had problems with my sound card (the M-Audio Audiophile 2496 PCI). Every 10-20 seconds the sound gets interrupted -it cuts out (well I think it's actually being delayed). I think it's because of an IRQ conflict as the information from 'System Information' says:

Conflicts/Sharing:
I/O Port 0x00000000-0x00000CF7 PCI bus
I/O Port 0x00000000-0x00000CF7 Direct memory access controller

I/O Port 0x000003C0-0x000003DF Intel(R) 82845 Processor to AGP Controller - 1A31
I/O Port 0x000003C0-0x000003DF NVIDIA RIVA TNT2 Model 64/Model 64 Pro

IRQ 9 Microsoft ACPI-Compliant System
IRQ 9 SCSI/RAID Host Controller

IRQ 16 NVIDIA RIVA TNT2 Model 64/Model 64 Pro
IRQ 16 Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2
IRQ 16 M-Audio Delta Audiophile
IRQ 16 RangeMax(tm) NEXT Wireless Adapter WN311B #2

Memory Address 0xA0000-0xBFFFF PCI bus
Memory Address 0xA0000-0xBFFFF Intel(R) 82845 Processor to AGP Controller - 1A31
Memory Address 0xA0000-0xBFFFF NVIDIA RIVA TNT2 Model 64/Model 64 Pro

I/O Port 0x000003B0-0x000003BB Intel(R) 82845 Processor to AGP Controller - 1A31
I/O Port 0x000003B0-0x000003BB NVIDIA RIVA TNT2 Model 64/Model 64 Pro

Used IRQs:
IRQ 0 System timer OK
IRQ 1 Standard 101/102-Key or Microsoft Natural PS/2 Keyboard OK
IRQ 6 Standard floppy disk controller OK
IRQ 8 System CMOS/real time clock OK
IRQ 9 Microsoft ACPI-Compliant System OK
IRQ 9 SCSI/RAID Host Controller OK
IRQ 12 PS/2 Compatible Mouse OK
IRQ 13 Numeric data processor OK
IRQ 14 Primary IDE Channel OK
IRQ 15 Secondary IDE Channel OK
IRQ 16 NVIDIA RIVA TNT2 Model 64/Model 64 Pro OK
IRQ 16 Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2 OK
IRQ 16 M-Audio Delta Audiophile OK
IRQ 16 RangeMax(tm) NEXT Wireless Adapter WN311B #2 OK
IRQ 18 Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7 OK
IRQ 19 Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4 OK
IRQ 23 Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Controller - 24CD OK

The motherboard is an MSI MS-6566E with Intel P4 2.4Ghz, and 1,280Mb(1.25Gb) memory. Windows XP Pro XP2 build 2600 (no further windows updates - they slow down and mess up the system even more!).

I've already tried rearranging the cards, and removed an unused Belkin 10/100 PCI Ethernet card, and this hasn't cured the problem. I can't find any obvious way to manually re-assign IRQs.

What does cure it, although only temporary, is to go to Device Manager and DISABLE the RangeMax Wireless adapter to enjoy uninterrupted sound when I need it for a while. The only drawbck with this is that I can't enjoy streaming audio/video/radio from the net (which I do a lot - this computer now acts as my lounge hi-fi).

So can anyone suggest how I might sort this out?

  LastChip 16:56 12 Aug 07

You may be able to remove Windows ability to allocate the IRQ's.

Try going into the motherboard BIOS and telling the BIOS to take control of the IRQ allocation. Sometimes, the BIOS makes a better job of it than Windows.

Having one IRQ sharing four components is almost guaranteed to slow something down and in this case, it's your sound feed.

Frankly, I don't know if it will work, but it's worth a try.

  Olly_jb 18:53 16 Aug 07

I tried that - in fact I think I already had the BOIS set to do that. I have six PCI slots, and it seems that slot 1 and 6 use the same IRQ, and so does 2 and 5...perhaps I should rearrange the cards again, but I'm not confident this will solve the problem.

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