KD7 Why are all of the PCI IRQ set to 11 ?

Discussion in 'Abit' started by Willim, Jul 13, 2003.

  1. Willim

    Willim Guest

    Win2000:
    Creative Modem Blaster
    Hauppauge WinTV Audio
    Hauppauge WinTV Video
    Realtek AC'97 Audio
    Realtek Ethernet
    3*Via USB Controller
    VIA Ethernet

    ....all of them on IRQ 11.

    Actually, with everything set to AUTO,
    all of them were IRQ 11 except for WinTV Audio, which somehow went to IRQ
    12.
    Doesn't make any sense, does it? The WinTV audio and video are both on the
    same card, in one slot, so shouldn't they both have gotten the same IRQ?

    Anyway, went into BIOS and set the PIRQ -> IRQ. 10, 7, 11, 12 to try
    and spread things out. The boot screen that lists the PCI IRQ indicated that
    I was somewhat successful, although the IRQ 7 became IRQ 3... at least
    both of the WinTV IRQ were the same...

    ....booted into Windows and checked Device Manager: all of the IRQ
    changed back to IRQ 11.

    Uninstalled, reinstalled the modem driver. Device Manager says it's using
    IRQ 3. OK, fine, at least it's not IRQ 11. Rebooted. Checked Device
    Manager:
    it's now back to IRQ 11.

    Doesn't seem to want to use anything other than IRQ 11 for the PCI cards.
    Guess it doesn't really matter; everything is working OK now...but shouldn't
    it be assigning the IRQ from the list of 4 in the BIOS? Windows over-rides
    the settings and changes them to IRQ 11??


    hmm... just noticed there's no IRQ assigned to the Printer Port.
    And shouldn't there be an IRQ for the AGP video card? that hasn't
    shown up in the list for a long time...

    What's going on here?
     
    Willim, Jul 13, 2003
    #1
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  2. Willim

    TomG Guest

    ACPI and IRQ sharing. it is normal in a PCI environment with ACPI enabled.

    --

    Thomas Geery
    Network+ certified

    ftp://geerynet.d2g.com
    ftp://68.98.180.8 Abit Mirror <----- Cable modem IP
    This IP is dynamic so it *could* change!...
    over 113,000 FTP users served!
    ^^^^^^^
     
    TomG, Jul 13, 2003
    #2
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  3. Willim

    Willim Guest

    enabled.

    Yeah, but should they ALL use the same IRQ, when there are several others
    available?
    IRQ 10 and 12 for instance aren't used at all... and isn't the point of that
    PIRQ->IRQ
    screen in the BIOS to specify the PCI IRQ?

    I've heard that you shouldn't put anything in slot #1 since it shares an IRQ
    with
    the AGP. The way things look right now it's only using one IRQ for all of
    the slots.
    (and what happened to that AGP interrupt anyway...)
     
    Willim, Jul 13, 2003
    #3
  4. Willim

    Doug G. Guest

    Doug G., Jul 13, 2003
    #4
  5. Willim

    TomG Guest

    again, it is quite normal. to get devices to not use IRQ's in this fashion,
    you would need to disable ACPI, convert the OS from an ACPI type
    installation to an older style APM installation and then the PIRQ settings
    might be able to drive a device to a different IRQ.

    --

    Thomas Geery
    Network+ certified

    ftp://geerynet.d2g.com
    ftp://68.98.180.8 Abit Mirror <----- Cable modem IP
    This IP is dynamic so it *could* change!...
    over 113,000 FTP users served!
    ^^^^^^^
     
    TomG, Jul 13, 2003
    #5
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