Keyboard randomly stops working

Discussion in 'Mac OS X Lion (10.7)' started by baryon, Aug 1, 2011.

  1. macrumors 68030


    Oct 3, 2009
    Sometimes I'm trying to type something and I realize that nothing's getting typed when I press the keys. I don't know what causes this and when exactly it happens, but so far I have not been able to make it go away unless I reboot.

    When the keyboard stops working, it's completely dead: Not only can I not type, but key combinations like [ Cmd + W ] and [ Alt + Arrow keys ] for swapping Desktops doesn't work either. As I remember though, the light on Caps Lock still works normally.

    Within one week it has happened to me twice so far, and I rebooted each time and that fixed it.
  2. macrumors newbie

    Oct 21, 2008
    a working keyboard is important

    I'm having the exact same problem with Lion. One time I tried putting the computer to sleep and bringing it back but the keyboard still did not work (and I could not type password to get back in).

    The next time it happened I logged out of my account and the keyboard started working again on the login screen. Can you confirm the same behavior?

    Also, maybe we can find out if a specific app is causing this. I believe that I was using either MacVim or iTerm2 both times this happened to me, can you correlate with that?
  3. macrumors member

    Sep 3, 2010
    My 2007 15" MacBookPro does this too after upgrading to Lion. It also happened after a fresh install of Lion rather than just the upgrade. Caps lock key light and num lock key lights work. I logged out and the keyboard started working when I tried to login.

    I saw that killing the dock would fix it, but I haven't tried it yet.,1...ding-working-in-mac-os-x-lion-how-to-fix.html
  4. chrisrk7, Aug 19, 2011
    Last edited: Aug 19, 2011

    macrumors newbie

    Mar 29, 2010
    Same issue

    I have a 17" MacBook Pro from 2007 (OSX 10.4.11) that's doing the same thing: the keyboard arbitrarily decides to stop working and I usually have to reset to fix it. A couple times I was able to regain use simply by going to a different program. I never had this problem before, but in the last month or so it has stopped working about 8 or 9 times.

    I don't know if it's related, but in the past couple days I noticed a significantly slower processor speed, one that leaves me staring at the spinning rainbow of doom far too often for far too long and it is starting to drive me crazy. I don't mean to derail this thread, I just don't know whether or not it could be relevant to diagnosing the problem and thought I'd rather be safe than sorry, so-to-speak.

  5. viruz.360, Sep 6, 2011
    Last edited: Sep 6, 2011

    macrumors newbie

    Nov 10, 2009
    I'm having this exact same problem.

    Sometimes it happens just randomly, but it also happens anytime I switch to Dashboard using ctrl-left.

    I've resorted to just opening Activity Monitor (using only the mouse...) and killing the Dock process.

    I'm using a fresh install of Lion on my Late 2008 MacBook Pro.

    edit: I narrowed down the problem:

    I disabled Dashboard as per this hint:

    Now, If I press crtl-left, dashboard doesn't appear but the keyboard still freezes.
    I also noticed that it freezes when pressing crlt-right (but not ctrl-up/down).

    I suppose this has something to do with spaces (but AFAIK you can't disable spaces in Lion).

    edit: I attached a small applescript-app to kill the Dock (easier than going to activity monitor everytime).

    Also, do any of you use a DisplayLink device with your mac? There might be a link between the DisplayLink drivers and the keyboard lockup problem.

    Attached Files:

  6. macrumors 6502a


    Mar 2, 2010
    San Diego, CA
    I had this problem with a late 2007 Macbook Pro 15" model. I read in a forum somewhere where someone had a similar issue and it appeared that a ribbon cable beneath the battery apparently warped or became more lose. The simple fix was to place a sticky-note folded up placed in between the copper-ish cable and the battery and carefully close the battery. This worked for me. If you have a unibody Mac this obviously won't work since you can't remove the battery.

    This person appears to have the same or similar problem.
  7. macrumors 65816


    Oct 3, 2010
    North of England
    I'm having this exact same problem at the moment as well. It happened once a week with Lion, but it happenes at least once a day with ML.

    I've got a mid-2009 15-inch MBP. So frustrating.

    Anyone got a fix?
  8. plumsauced, Mar 6, 2015
    Last edited: Mar 6, 2015

    macrumors newbie

    Mar 6, 2015
    try pressing alt 5 times

    Hi Guys,

    Try pressing alt five times - this enables and disables the "mouse keys" function which disables the keyboard.

    I have to credit this to brownknee at mac forums:

    I thought this was an issue related to photoshop, and have been searching for a fix for a long time, so happy to share this. Just found brownknee's answer today and thought I'd share.

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