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IRQ conflict and random re-booting

By velectro
Jan 25, 2009
  1. Hi all,

    My computer is suffering from random re-starts, with the message:

    driver_irql_not_less_or_equal
    stop: 0x000000d1 (0x00485404, 0x000000ff, 0x0000001, 0xBA6CD062)

    Here is the info from system information:

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

    I/O Port 0x000003C0-0x000003DF PCI standard PCI-to-PCI bridge
    I/O Port 0x000003C0-0x000003DF NVIDIA GeForce 8400 GS

    IRQ 21 Microsoft UAA Bus Driver for High Definition Audio
    IRQ 21 NVIDIA MCP61 Serial ATA Controller

    I/O Port 0x0000B000-0x0000BFFF PCI standard PCI-to-PCI bridge
    I/O Port 0x0000B000-0x0000BFFF NVIDIA GeForce 8400 GS

    Memory Address 0xE0000000-0xEFFFFFFF PCI standard PCI-to-PCI bridge
    Memory Address 0xE0000000-0xEFFFFFFF NVIDIA GeForce 8400 GS

    Memory Address 0xA0000-0xBFFFF PCI bus
    Memory Address 0xA0000-0xBFFFF PCI standard PCI-to-PCI bridge
    Memory Address 0xA0000-0xBFFFF NVIDIA GeForce 8400 GS

    I/O Port 0x000003B0-0x000003BB PCI standard PCI-to-PCI bridge
    I/O Port 0x000003B0-0x000003BB NVIDIA GeForce 8400 GS

    Memory Address 0xF8000000-0xFBFFFFFF PCI standard PCI-to-PCI bridge
    Memory Address 0xF8000000-0xFBFFFFFF NVIDIA GeForce 8400 GS




    I have already done a re-format and fresh XP install, but it hasnt solved it. I tried to manually change IRQ but of course found it was greyed out and i couldn't!

    I have reached the end of my tether and PC knowledge,so I'm hoping someone on here can help!

    Thanks.
     
  2. Route44

    Route44 TechSpot Ambassador Posts: 11,966   +70

    Don't mess with IRQ levels! That error 0xD1 is due to faulty drivers or buggy software. What is happening is a driver is trying to access an IRQ level it has no right doing.

    So, we need to find the driver or software that is causing the issues. Have you changed or added any software recently? When do these BSODs occur, gaming, websurfing, etc.?
     
  3. velectro

    velectro TS Rookie Topic Starter

    Thanks for posting. A couple of weeks ago it was time for a re-format etc (no partic reason, PC just slow...full of rubbish), so did that and installed everything as i always had done - same drivers etc. I think the only driver difference at this point was to use the latest Nvidia GPU driver i had previoulsy used a one from a few months ago.

    Then this problem started, so i re-formatted again and used the latest drivers for everything, thinking that might solve it...except of course it hasn't! MMmm....maybe i should go back to using an older GPU driver?

    The BSOD's always happen when i try and start the game "obscure" but sometimes when i am just surfing etc and hardly using system resources.

    The minidump says kmixer.sys is the culprit, but i'm not sure what to do with this info as i am at the limit of my PC knowledge!
     
  4. Route44

    Route44 TechSpot Ambassador Posts: 11,966   +70

    kmixer.sys belongs to your Windows OS and is part of the Audio mixer. But it is too general to be of much help.

    Attach your five latest minidumps to your next post(up to 5 in one Zip file).
     
  5. velectro

    velectro TS Rookie Topic Starter

    Thanks, i only have 2 but here they are
     
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