Crash Due to cldflt.sys on Exiting a 3D Game

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  1. Posts : 7,089
    Windows 10 Pro 64 bit
       #1

    Crash Due to cldflt.sys on Exiting a 3D Game


    My desktop PC crashed to a black screen then restarted yesterday after exiting a 3D game - see summary report below. This PC was updated to v1903 a few days ago and worked fine until then. I've run chkdsk on the drives and sfc /scannow which show no problems. The driver responsible is cldflt.sys. I found this report blaming KB4517389. I don't have this update but I do have cumulative update KB4522355. See Windows 10’s latest update reportedly causes Blue Screen of Death issues | TechRadar

    Any ideas what this might be due to and how to fix it?

    Summary crash report:

    ==================================================
    Dump File : 102819-13656-01.dmp
    Crash Time : 28/10/2019 17:05:37
    Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
    Bug Check Code : 0x1000007f
    Parameter 1 : 00000000`00000008
    Parameter 2 : ffffe500`ef1eaf90
    Parameter 3 : ffff8507`a7126fe0
    Parameter 4 : fffff807`6da6b506
    Caused By Driver : cldflt.sys
    Caused By Address : cldflt.sys+ad43
    File Description : Cloud Files Mini Filter Driver
    Product Name : Microsoft® Windows® Operating System
    Company : Microsoft Corporation
    File Version : 10.0.18362.449 (WinBuild.160101.0800)Processor : x64
    Crash Address : ntoskrnl.exe+6b506
    Stack Address 1 :
    Stack Address 2 :
    Stack Address 3 :
    Computer Name :
    Full Path : C:\WINDOWS\Minidump\102819-13656-01.dmp
    Processors Count : 4
    Major Version : 15
    Minor Version : 18362
    Dump File Size : 321,090
    Dump File Time : 28/10/2019 17:06:16==================================================
    Last edited by Steve C; 30 Oct 2019 at 01:56.
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  2. Posts : 5,176
    64bit Win 10 Pro ver 21H2
       #2

    The windows driver itself is not likely to be the problem but some other interaction going on in the background. It might be possible to explore this further with a full memory dump or even the mini-dump. Please follow the posting instructions at the top of the page and provide the logfiles.
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  3. Posts : 7,089
    Windows 10 Pro 64 bit
    Thread Starter
       #3

    philc43 said:
    The windows driver itself is not likely to be the problem but some other interaction going on in the background. It might be possible to explore this further with a full memory dump or even the mini-dump. Please follow the posting instructions at the top of the page and provide the logfiles.
    I enclose the forum error report file. Thanks in anticipation for any analysis.
      My Computers


  4. Posts : 5,176
    64bit Win 10 Pro ver 21H2
       #4

    To start with I usually check the hardware logs and I can see that you are overclocking your system beyond the recommended max turbo frequency. You are also running your RAM at a higher clock frequency than recommended. Now it may be that you tested these settings for stability but a recent update has slightly shifted what will be acceptable. I would recommend that you remove overclocking and test to see if the crashes stop. If they do you can try to reintroduce some degree of overclocking and try to find a new stable position.

    Max recommended CPU turbo freq is 3.80GHz
    Max recommended DDR3 Memory clock speed is 1600MHz
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  5. Posts : 7,089
    Windows 10 Pro 64 bit
    Thread Starter
       #5

    philc43 said:
    To start with I usually check the hardware logs and I can see that you are overclocking your system beyond the recommended max turbo frequency. You are also running your RAM at a higher clock frequency than recommended. Now it may be that you tested these settings for stability but a recent update has slightly shifted what will be acceptable. I would recommend that you remove overclocking and test to see if the crashes stop. If they do you can try to reintroduce some degree of overclocking and try to find a new stable position.

    Max recommended CPU turbo freq is 3.80GHz
    Max recommended DDR3 Memory clock speed is 1600MHz
    Good point about the Turbo frequencies. I tested these a while ago for stability and set them all to 40 without any problems. I've now set them back to defaults 38, 38, 37, 36

    The memory is using XMP profile 2 on the middle Turbo setting and should be within spec.
    Attachment 252825
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  6. Posts : 5,176
    64bit Win 10 Pro ver 21H2
       #6

    OK, see how you get on. The memory will certainly cope with 1866MHz but I am not sure if the CPU will work well with the RAM at that clock speed. The maximum memory speed recommended for the CPU and memory to work together is 1600MHz based on the Intel datasheet.
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  7. Posts : 7,089
    Windows 10 Pro 64 bit
    Thread Starter
       #7

    philc43 said:
    OK, see how you get on. The memory will certainly cope with 1866MHz but I am not sure if the CPU will work well with the RAM at that clock speed. The maximum memory speed recommended for the CPU and memory to work together is 1600MHz based on the Intel datasheet.
    This just happened again - same error & same symptoms on exiting Far Cry New Dawn.
    The game plays OK then when you exit there is a black screen and the PC reboots. All was fine until the upgrade to v1903 a few days ago.

    It's odd the error is associated with cldflt.sys which I believe is connected with Onedrive.
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  8. Posts : 5,176
    64bit Win 10 Pro ver 21H2
       #8

    Can you post a new set of logfiles please.
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  9. Posts : 7,089
    Windows 10 Pro 64 bit
    Thread Starter
       #9

    philc43 said:
    Can you post a new set of logfiles please.
    See enclosed.

    I could substitute the current version of cldflt.sys with the version from v1809 or would that cause more problems?

    Current v1903 version of cldflt.sys is 10.0.18362.449
    Previous v1809 version of cldflt.sys (from Reflect image) is 10.0.17763.348
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  10. Posts : 5,176
    64bit Win 10 Pro ver 21H2
       #10

    Thanks! I see you still had the memory speeds at the higher setting. If you have the time I would like to rule that out as a possible contributor.

    There is also another driver in the stack at the time of the crash - the graphics driver atikmdag.sys. I am not 100% convinced this is the problem but if there is an update for it, it might be worth trying that too.

    If it still crashes on exiting the game I think you will then have to report it to Microsoft. There may be something going on with the 1903 update that they are working on - there are certainly a few reports like the one you referred to.
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