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System.exe uses ~15% CPU (acpi.sys + interrupts.exe using 1 Core at 100%) RRS feed

  • Question

  • Hello, 

    i'm having this issue for a couple days when i installed an SSD in my Samsung Series 7 laptop.

    I reinstalled windows 8.1 twice using all drivers provided from manufacter, then tried update all independtly, installed and reinstalled several times, nothing changed, always system.exe uses ~15% CPU (acpi.sys + interrupts.exe using 1 Core at 100%).

    One thing i noticed:

    1- when i insert a disk in optical drive system.exe goes 0% (no more acpi.sys) and interrupts.exe goes to ~0.5%
    2- when i eject the disk from optical drive again system.exe uses ~15% (acpi.sys + interrupts.exe using 1 Core at 100%)

    So i ran 2 xperf (one with disk in optical drive, one without disk in optical drive)

    Links
    with disk inserted: https://www.dropbox.com/s/wa5rcs07anzha2z/with_disk_inserted.zip?dl=0

     
    without disk inserted: https://www.dropbox.com/s/511ojrmbgvj8pnt/without_disk_inserted.zip?dl=0

    Why is this happening?



    • Edited by Murdpower Saturday, January 3, 2015 9:57 PM update links
    Saturday, January 3, 2015 9:45 PM

Answers

  • Hi, 

    thank you very much for your reply.

    well, i don't know how the problem gone away...but it did. for one week i kept a disk inside optical drive to prevent system.exe use cpu...but today i was checking some CDs, so i inserted like 5 cds in a row and now i noticed that without disk there is no system.exe using 15% of the cpu. now everything is normal...don't know what was causing the issue but for now it's ok.

    i still have two other problems with my pc. since when i installed the SSD, my computer sometimes freezes for 30 seconds...already made a research about the problem and none of the solution people talk about in internet seems to solve my problem...this is what appears in event log when it freezes for 30 seconds:

    https://www.dropbox.com/s/vwohti5ut491y6y/Capturar.PNG?dl=0

    I have lastest AHCI drivers, i do not have intel rapid techonologic installed (if installed same freezing, but warnings are diferent: storeahci + disk warnigs). What can be the problem? can't i have a ssd in my pc?

    Saturday, January 10, 2015 11:47 PM

All replies

  • Hi,

    Sorry for my dilatory reply. There is a problem open the etl files you provided.

    What's the results after running xperf? Is there any trace log?

    Since this problem occures when ejecting the disk from optical drive, it is probably because some handles were occupying its resource. You can refer to the screenshot below to check its handle for test:


    Roger Lu
    TechNet Community Support

    Friday, January 9, 2015 3:10 PM
  • Hi, 

    thank you very much for your reply.

    well, i don't know how the problem gone away...but it did. for one week i kept a disk inside optical drive to prevent system.exe use cpu...but today i was checking some CDs, so i inserted like 5 cds in a row and now i noticed that without disk there is no system.exe using 15% of the cpu. now everything is normal...don't know what was causing the issue but for now it's ok.

    i still have two other problems with my pc. since when i installed the SSD, my computer sometimes freezes for 30 seconds...already made a research about the problem and none of the solution people talk about in internet seems to solve my problem...this is what appears in event log when it freezes for 30 seconds:

    https://www.dropbox.com/s/vwohti5ut491y6y/Capturar.PNG?dl=0

    I have lastest AHCI drivers, i do not have intel rapid techonologic installed (if installed same freezing, but warnings are diferent: storeahci + disk warnigs). What can be the problem? can't i have a ssd in my pc?

    Saturday, January 10, 2015 11:47 PM
  • Hi,

    Because the language of your Event Log is not English, It's hard for me to figure out the reason of this problem. You can visit http://support.microsoft.com/common/international.aspx and choose your language for support.


    Roger Lu
    TechNet Community Support

    Monday, January 12, 2015 1:43 AM
  • Thank you! I would never have figured out that the CDROM drive was causing this without your post. I even disabled the device in the system manager thinking I would find the problem that way, but nothing mattered until I inserted a disk into the drive.

    I don't know why it does it, but I am much happier just leaving a disk inserted permanently than to spend more time trying to understand it.

    Monday, December 4, 2017 9:37 PM