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    NP8662 High CPU Usage at Idle

    Discussion in 'Sager and Clevo' started by tekian, Aug 31, 2009.

  1. tekian

    tekian Notebook Geek

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    Hey there,

    Recently received my NP8662 and I'm loving it. However, one thing that is bothering me is that while at idle, my CPU usage ranges from 30%-50%. The culprit is a process called WUDFHOST.exe. I've googled numerous sites but haven't been able to find exactly why it's using so much of my processing at idle.

    Terminating the file doesn't do anything as it simply just starts back up immediately. I'm pretty sure its not a virus, because what I have found out is that is has something to do with USB devices, and terminating it causes my mouse to freeze for a few seconds. I've tried removing all usb devices but it still won't calm down.

    Another person told me that CPU usage can run high if you have a faulty CPU. This true?

    Thanks :)

    Edit: Was able to track down the source to why WUDFHost was having to work so hard. First off, WUDFHost is the application which facilitates User-Mode drivers, or drivers that have no access to the underlying kernal for the operating system. Turns out that my fingerprint scanner is using a User-Mode driver, and is basically hogging up the CPU while it runs. (User-Mode drivers run almost like applications). Anyone else have Windows Vista / 7 and notice that their CPU runs a little too much when it's not supposed to? If not, what driver are you using?

    Edit 2: Nevermind. Found that the issue was with the included software. Kept a constant attachment to the reader without letting itself idle. Uninstalled and simply using the driver based enrollment now.

    I'll try to do a bit more poking and proding before posting :3
     
    tekian, Aug 31, 2009
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  2. theriko

    theriko Ronin

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    Which version of the fingerprint software are you using? You can get version 5.8 from the clevo website here
     
    theriko, Aug 31, 2009
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  3. Tarentum

    Tarentum Notebook Deity

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    Do you use your fingerprint scanner? I have that (and bluetooth, most of the time my wireless card, and camera) permanently disabled. Saves battery and heat as well (I yank out extra software that loads with hijackthis normally).
     
    Tarentum, Sep 1, 2009
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  4. theriko

    theriko Ronin

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    I find my FPR quite useful for storing passwords, easy login and easy program launch
     
    theriko, Sep 2, 2009
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  5. tekian

    tekian Notebook Geek

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    I use it for logging in. Saves me a good 10-30 seconds when I'm in a rush typing in my password, haha. I find that after uninstalling the application for it then using Windows 7's biometric login feature, I actually gained a good bit of battery life since my CPU usage went down dramatically.
     
    tekian, Sep 2, 2009
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