Mouse pauses routinely if external monitor turned off

Discussion in 'iMac' started by gruvin, Apr 20, 2012.

  1. gruvin, Apr 20, 2012
    Last edited: Jul 23, 2012

    gruvin macrumors newbie

    Apr 20, 2012

    If I have my external monitor (22" Samsung LCD) plugged in but turned off, then the mouse pointer and/or keyboard entry (back on the main iMac desktop) pauses for about half a second, just about every second or so for the duration the external monitor remains switched off.

    If I unplug or switch on the external monitor, then mouse and keyboard response is immediately restored to normal. (Other processing appears to be unaffected.)

    I've had this problem for well over a year now, stretching back to OS X Snow Leopard, at least. I've been waiting patiently (mostly) for a software update to fix it. But it hasn't come. (Currently running the latest rendition of Lion 10.7.4 [updated].)

    So I thought I'd ask here, to see if others might have noticed the same glitch / bug?
  2. stiwi macrumors regular

    Nov 13, 2010
    Did you find a solution? I experience exactly the same issue. Monitor connected to Mac Pro via mini displayport but switched off (mouse jumps), if 2nd monitor is switched on or disconnected from power socket everything is okay.
  3. gruvin thread starter macrumors newbie

    Apr 20, 2012
    No I did not, sorry. Problem still exists as of OS X 10.7.4.

    Interesting to hear that it happens on the laptop as well. Thanks.

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