Questions

Missing IRQ numbers 2-7. anyone know why?

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Missing IRQ numbers 2-7. anyone know why?

johnsondb
Also #16 has SMbus controller, UAA Bus Driver, intel express chipset family, 18 has a universal host controller as dopes #19 which also has a storage controller and #23 has another host controller and an advanced usb host controller. I s this normal. Problematic? possible security issue?

xp pro sp2 on hp pallion a820n
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    bhatnagar_nitin

    Well, I don't see any issue in that. Its the windows hardware allocation of resources which decides which component require which IRQ. My PC too don't show IRQ#2, 5, 7 etc.

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    HAL 9000 Moderator

    But as it's most likely a Windows Reading the obvious thing is that the missing IRQ Numbers have been reserved and are not available to Windows to issue.

    With any form of Windows it's not uncommon to share IRQ and depending on the hardware involved it's possible to have several items sharing the same IRQ.

    The only thing that it's a sign of is that you have Windows Installed and it's managing the available hardware as best as possible. This Is Perfectly Normal and nothing to worry about unless something isn't working. Then you may need to manually change the IRQ's to get whatever it is that isn't working to work but you need to be very careful along the way as it's possible to cure one problem and create several others.

    If you look at the DMA's you'll most likely find that while the IRQ are the same they have different DMA's so that the hardware continues to work. The days on needing to manually change IRQ's and DMA's are now long gone and with the more complex hardware involved these days the need to share the available IRQ's has become necessary because of the increasing complexity of computers.

    Col

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    0 Votes
    bhatnagar_nitin

    Well, I don't see any issue in that. Its the windows hardware allocation of resources which decides which component require which IRQ. My PC too don't show IRQ#2, 5, 7 etc.

    +
    0 Votes
    HAL 9000 Moderator

    But as it's most likely a Windows Reading the obvious thing is that the missing IRQ Numbers have been reserved and are not available to Windows to issue.

    With any form of Windows it's not uncommon to share IRQ and depending on the hardware involved it's possible to have several items sharing the same IRQ.

    The only thing that it's a sign of is that you have Windows Installed and it's managing the available hardware as best as possible. This Is Perfectly Normal and nothing to worry about unless something isn't working. Then you may need to manually change the IRQ's to get whatever it is that isn't working to work but you need to be very careful along the way as it's possible to cure one problem and create several others.

    If you look at the DMA's you'll most likely find that while the IRQ are the same they have different DMA's so that the hardware continues to work. The days on needing to manually change IRQ's and DMA's are now long gone and with the more complex hardware involved these days the need to share the available IRQ's has become necessary because of the increasing complexity of computers.

    Col