Constant CPU usage by WiFi

Discussion in 'HP Slate' started by tabfan, Feb 14, 2012.

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  1. tabfan

    tabfan Pen Pal - Newbie

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    When WiFi is on and AC plugged, system (NT kernel) uses 12-15% CPU. If I disconnect the wifi, idle cpu goes to normal, 0-1% total. No such excessive CPU usage when on battery.
     
  2. 2disbetter

    2disbetter Function over Form

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    It is possible there is an event triggered by AC power and and active connection. (IE: auto update, etc.)

    You could try re-installing your wireless drivers as well.

    2d
     
  3. tabfan

    tabfan Pen Pal - Newbie

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    I did, even tried another wifi driver found on google search. All auto update are disabled.
     
  4. Steve S

    Steve S Pen Pro - Senior Member Super Moderator

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    <<...When WiFi is on and AC plugged, system...uses 12-15%...>>

    ...If you really want to diagnose this, get screen shots of your running processes (Task Manager, Processes tab) with and without AC. That should suggest what's using all those CPU cycles. You can then decide whether or not you want to disable those processes...

    (However, since you're on AC, does it really matter that the CPU is moderately busy...???)
     
  5. Bronsky

    Bronsky Wait and Hope. Senior Member

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    +1. I think you'll find that those extra processes are taken up by functions that are turned off by the power profile when the device is on battery.
     
  6. tabfan

    tabfan Pen Pal - Newbie

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    As I said it is the system (nt kernal) that uses the cpu, and goes down to 0% if I disconnect wifi. So it must be the wifi driver.

    The Z540 cpu is already strutting for windows 7, and 15% wasted for nothing? It makes the slate much hotter and less responsive especially in firefox.
     
  7. tabfan

    tabfan Pen Pal - Newbie

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    I have an USB wifi dongle, when I use it on the slate, no problem at all, CPU stays at 0-1%. So, the Broadcom wifi card sucks, need to find a good one to replace it.
     
  8. ships10

    ships10 Scribbler - Standard Member Senior Member

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    Good luck replacing it. Read my thread on the HP wifi card.HP has blocked all
    other wifi cards...including their own !
     
  9. tabfan

    tabfan Pen Pal - Newbie

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  10. revmike

    revmike Scribbler - Standard Member

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    Has this new driver had any effect on the wifi connection ability?
     
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