1.    19 Aug 2017 #1
    Join Date : Aug 2017
    Posts : 2
    Windows 10

    System and Compressed Memory uses 40% CPU after waking up from sleep


    The computer seems to work pretty much fine after every startup, but problems starts emerging after waking up from sleep/hibernation. After waking up from sleep, I notice that the computer starts heating up and fans are throttling.

    The 'System and Compressed Memory' process reaches up to 35% as seen on task manager, using Process Explorer, I can see that the thread 'ntoskrnl.exe!CcCopyWriteWontFlush+0xb50' seems to be causing the issue.

    Some peripherals also sometimes stops working after waking up from sleep, such as fingerprint sensor, WiFi, and screen brightness not being able to be changed. The only way to but things back is by restarting the computer, which is rather inconvenient. I have attached some screenshots from task manager and process explorer before and after resuming from sleep.

    I have tried these troubleshooting tips but none brings this problem to an end:
    • Update all device drivers
    • Scan for hardware changes in Device Manager
    • Disabling pagefile (and re-enabling it)
    • Disable fastboot (and re-enabling it)
    • Disable memory diagnostics (and re-enabling it)
    • Re-installing graphics card driver

    It is hard to sleep the computer after the first sleep wake up, it could take up to 5 mins. Shutting it down is also an issue, it could take minutes, or even causes a BSOD with error code 'DRIVER_POWER_STATE_FAILURE'. (all these anomalies occur after waking up from the first sleep, and I am on a laptop)

    I wonder if there is a solution to this problem. Thanks!

    Before sleep:
    Click image for larger version. 

Name:	hack_before.PNG 
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Size:	43.1 KB 
ID:	149525Click image for larger version. 

Name:	task_before.PNG 
Views:	21 
Size:	46.5 KB 
ID:	149526

    After waking up from sleep:
    Click image for larger version. 

Name:	hack_after.PNG 
Views:	21 
Size:	49.2 KB 
ID:	149527Click image for larger version. 

Name:	task_after.PNG 
Views:	21 
Size:	43.4 KB 
ID:	149528

      My ComputerSystem Spec
  2.    19 Aug 2017 #2
    Join Date : Oct 2014
    Trnava
    Posts : 2,865
    Windows 10.4 Home 1709 x64

    You should upgrade to CU, that might fix it. Other than that, try disabling superfetch/prefetching.

    Code:
    sc config SysMain start= disabled
    net stop SysMain /y
    reg add "HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters" /v "EnablePrefetcher" /t REG_DWORD /d "0" /f
    reg add "HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters" /v "EnableSuperfetch" /t REG_DWORD /d "0" /f
    reg add "HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters" /v "SfTracingState" /t REG_DWORD /d "0" /f
      My ComputerSystem Spec
  3.    19 Aug 2017 #3
    Join Date : Aug 2017
    Posts : 2
    Windows 10
    Thread Starter

    Hi TairikuOkami, I've tried disabling superfetch and prefetch but that gives no change. I will update as soon as I've upgrade to CU.
    Thank you for your time.
      My ComputerSystem Spec

 


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