Laptop keyboard and touchpad randomly do not work


  1. Posts : 47
    Windows 10 Pro 64bit
       #1

    Laptop keyboard and touchpad randomly do not work


    Ever since I've upgraded my dad's laptop to Windows 10, the keyboard and touchpad stop working randomly, and would work only after I restart the computer. (logging off, switch user, standby mode doesn't resolve it.)
    There is no pattern to it. Sometimes it would be ok for a few days, sometimes it would happen again after a few hours. I mostly do internet browsing on the laptop.

    When the problem occurred:
    - The keyboard AND the touchpad would both stop working at the same time.
    - USB mouse still works. (I do not have an external keyboard to test)
    - The lights on the keys themselves (eg caps lock, wifi) would still remain on if they're activated but cannot be toggled on/off as usual.
    - The device manager still showed no problems with the mouse or keyboard.

    Things I've tried:
    - sfc /scannow
    - disabled sticky keys
    - used the generic drivers for keyboard and touchpad
    - reinstalled the drivers for keyboard and touchpad
    - updated to the latest synaptics driver
    - made a new synaptics trackpad profile
    - disabled touchpad when using the USB mouse

    Laptop stats:
    HP Pavillion dm1-4002AU
    Windows 10 Home 64bit (upgraded from Win7 and then reset to a fresh state)
    AMD Radeon HD 6230 Graphics
    6GB RAM
    Synaptics Driver Version: 19.0.12.95 06Jul15
    Synaptics PS/2 Port TouchPad
    Lenovo ThinkPad PS/2 keyboard

    This is very exasperating. I would appreciate some help in stopping this problem permanently, thanks.
    Last edited by krytoned; 25 Aug 2015 at 07:44.
      My Computer


  2. Posts : 1
    W7, W10
       #2

    I am having the same problem. Is there any update on this ??
      My Computer


  3. Posts : 58
    Win10
       #3

    Having the SAME problem on thinkpad Yoga!
      My Computer

  4. EdTittel's Avatar
    Posts : 3,753
    Windows 10
       #4

    Been there, done that, and in every case in my personal experience (Lenovo and Dell tablets and notebooks) the Synaptics driver was the problem. I notice that the generic Synaptics drivers on their download page are up to version 19.0.19.1. Have you tried one of these (you probably need the SMBus version)?

    Windows 10 PS/2 & SMBus Devices v19.0.19.1*



    Windows 10 I2C Devices v19.0.19.1*



    HTH,
    --Ed--
      My Computers


  5. Posts : 58
    Win10
       #5

    Thanks Ed Tittel,
    I thought I managed to fix it with the Synaptics drivers as you suggests. So I went to install all of them. But now I see that the problem is still on. Every couple of hours/days suddenly the keyboard stops working completely, and only after restart/hibernate-rehibernate it becomes responsive again.
      My Computer

  6. EdTittel's Avatar
    Posts : 3,753
    Windows 10
       #6

    Sorry for your trouble. Keep messing around with the drivers. Sooner or later, you'll find a combination that works for your rig (or rigs).
    --Ed--
      My Computers



  7. Posts : 58
    Win10
       #7

    Okay, thanks. I will try to install your first suggested driver (indeed, what is the second one?)
      My Computer

  8. EdTittel's Avatar
    Posts : 3,753
    Windows 10
       #8

    SMBus and IC2 are two different kinds of "attachment chips" that enable the touchpad to hook itself into a device chain on some port or another. Each uses different drivers because each is based on slightly different hardware (SMBus is a strict subset of IC2/I2C, in fact). If you look under "System devices" in DevMgr, you'll see SMBus on most notebooks, laptops, or tablets, and IC2 on certain others. Here's a screencap from my Lenovo X220 Tablet showing the SMBus device item:
    Laptop keyboard and touchpad randomly do not work-smbusdrv.jpg
    If you really want to root around in the gory details here's a technical discussion: Comparing the IC Bus to the SMBus - Application Note - Maxim.
    HTH,
    --Ed--
      My Computers


  9. Posts : 58
    Win10
       #9

    Hmm....a new year...but still the same problem: I updated all my drivers using Driver Booster 4 (a shareware that automatically updates all your drivers) and the same problem persists: random switching off of the keyboard on my Yoga Thinkpad s2, Win10, 64bit.
      My Computer


 

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