1. #1

    Join Date
    Sep 2017
    Location
    Indianapolis, IN
    Posts
    3

    [W10StdV1703b15063 x64] DPC audio crackling. BIOS UPDATE FIXED THIS.

    Hello,

    Thanks for reading my first post here! I've been trying to troubleshoot some audio issues I've been having with my Alienware 17 R3 laptop. When listening to audio it crackles and pops and I've run LatencyMon tests that confirm to me that this is a dpc latency issue. Specifically it seems like NDIS.sys is the issue but I think it could be more drivers as well. Unfortunately I don't have a lot of knowledge when it comes to latency issues. I believe I have all of the files requested for help but let me know if I missed something that is needed. I greatly appreciate any help you can give.
    Attached Files Attached Files


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  2. #2

    Join Date
    Sep 2017
    Location
    Indianapolis, IN
    Posts
    3

    Re: DPC Latency causing audio crackling

    QUICK SPECS:
    Intel i7-6700HQ @ 2.6GHz
    NVIDIA GeForce GTX 970M
    8GB DDR4 RAM
    Motherboard: Alienware model 0GH72M

  3. #3
    writhziden's Avatar
    Join Date
    May 2012
    Location
    Colorado
    Posts
    2,328
    • specs System Specs
      • Manufacturer:
        Sony
      • Model Number:
        VPCF232FX/B
      • Motherboard:
        Sony Corporation VAIO
      • CPU:
      • Memory:
        8.00 GB Crucial CT2KIT51264BF1339 DDR3 1333
      • Graphics:
      • Sound Card:
        Realtek High Definition Audio/nVidia High Definition Audio
      • Hard Drives:
        TOSHIBA MK5061GSY 500 GB (465 GB actual)
      • Case:
        Laptop black matte case with backlit keyboard
      • Cooling:
        Air cooling via fan and heat exchanger heatsink
      • Display:
        Laptop display
      • Operating System:
        Windows 7 Home Premium 64 Bit

    Re: DPC Latency causing audio crackling

    The first non-Windows driver listed that is likely causing issues is your Intel Storage Controller driver. Check your Alienware support for any driver updates related to your Intel Storage Controller.

    I also notice that your system is setup in a RAID configuration. I do not know why laptop manufacturers have started doing that (I recently found out my own laptop was setup that way), but RAID is not recommended for the average user. It also makes troubleshooting issues with Intel controllers more difficult because Microsoft does not have generic driver versions to test with. The only safe way to switch to SATA from RAID is to backup important data on the system and clean install Windows after changing to SATA through the BIOS. Hopefully that will not be necessary, but if you cannot resolve the issue by installing different driver versions, a clean install should be considered.


    EDIT: It looks like your system also has a BIOS update available. It addresses the following:

    Fixes & Enhancements
    Enhancements:
    1. Update Intel microcode
    2. Update RAID Option ROM
    3. Update Intel GOP and VBIOS
    4. Improve user experience of Alienware Command Center
    5. Security enhancement
    Last edited by writhziden; 09-05-2017 at 08:51 AM.
    Dallas says thanks for this.

  4. #4

    Join Date
    Sep 2017
    Location
    Indianapolis, IN
    Posts
    3

    Re: DPC Latency causing audio crackling

    Quote Originally Posted by writhziden View Post
    The first non-Windows driver listed that is likely causing issues is your Intel Storage Controller driver. Check your Alienware support for any driver updates related to your Intel Storage Controller.

    I also notice that your system is setup in a RAID configuration. I do not know why laptop manufacturers have started doing that (I recently found out my own laptop was setup that way), but RAID is not recommended for the average user. It also makes troubleshooting issues with Intel controllers more difficult because Microsoft does not have generic driver versions to test with. The only safe way to switch to SATA from RAID is to backup important data on the system and clean install Windows after changing to SATA through the BIOS. Hopefully that will not be necessary, but if you cannot resolve the issue by installing different driver versions, a clean install should be considered.


    EDIT: It looks like your system also has a BIOS update available. It addresses the following:

    Fixes & Enhancements
    Enhancements:
    1. Update Intel microcode
    2. Update RAID Option ROM
    3. Update Intel GOP and VBIOS
    4. Improve user experience of Alienware Command Center
    5. Security enhancement
    The BIOS update seemed to fix the issue for me although I'm not 100% sure it won't come back again. Thanks for the help!

  5. #5
    xilolee's Avatar
    Join Date
    Dec 2013
    Location
    World, Europe, Italy
    Posts
    2,108
    • specs System Specs
      • Manufacturer:
        XILOLEE.com
      • Model Number:
        XILO
      • Motherboard:
        ASROCK FM2A88M Pro3+ chipset A88X Bolton-D4
      • CPU:
        A10-7800, 4 CPU, 4 thr, 65/45W, FM2+, 28nm, Steamroller/Kaveri
      • Memory:
        10GB (Nanya and kingston ddr3-1333 9-9-9-24)
      • Graphics:
        Radeon R7 720MHz (8 GPU cores, integrated in CPU)
      • Sound Card:
        RealTek ALC662 (integrated in MB)
      • Hard Drives:
        Seagate ST500DM002-1BD142 500GB 7200RPM
      • Power Supply:
        SuperFlower 450W 80+ Platinum (SF-450P14PE)
      • Case:
        Sharkoon VG4-S
      • Cooling:
        Realtek RTL8111GR (NIC integrated in MB)
      • Display:
        Samsung SyncMaster SA100 LS22A100NS-EN
      • Operating System:
        Windows 10 Home/Standard x64

    Re: DPC Latency causing audio crackling

    Marked as solved, but keep us updated if it happens again.

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