Can you turn off the quto Dim on the iMac screens?

Discussion in 'iMac' started by coolurjets, Sep 14, 2007.

  1. coolurjets macrumors newbie

    Joined:
    Mar 20, 2007
    Location:
    UK
    #1
    After like 5 min of non-use, my 20" iMac (not the new metal one) screens dims to about half brightness. I understand this is to ave power but it get really annoying when your trying to watch something on the internet.

    So is there anyway to turn off this dimming? I've had a look all around the preference panel and can't seem to find an option, maby I just missed it.

    Cheers :apple:
     
  2. mrgreen4242 macrumors 601

    mrgreen4242

    Joined:
    Feb 10, 2004
    #2
    There's a power saving menu in the preference panel, and you can adjust the display options in there.
     
  3. dpaanlka macrumors 601

    dpaanlka

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    Nov 16, 2004
    Location:
    Illinois
  4. coolurjets thread starter macrumors newbie

    Joined:
    Mar 20, 2007
    Location:
    UK
    #4
    Ive checked there, but the only options are for

    Putting the computer to sleep when inactive for...
    Put the display to sleep when inactive for...
    Wake for ethernet admin
    Power button to sleep computer
    Automatically Reduce brightness before sleep
    Restart automatically after power failure

    And none of the seem to affect the screen from dimming aftera short while.
     
  5. rainydays macrumors 6502a

    Joined:
    Nov 6, 2006
    #5
    No offense. But it amazes me that some people take their time to write a question on a forum instead of spending a few seconds looking in the System Preferences. :confused:
     
  6. dpaanlka macrumors 601

    dpaanlka

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    Nov 16, 2004
    Location:
    Illinois
    #6
    "Automatically Reduce brightness before sleep" should be what you want. If it doesn't work, there might be a preference file corrupt somewhere or something. Try repairing permissions and restarting.
     
  7. irishgrizzly macrumors 65816

    irishgrizzly

    Joined:
    May 15, 2006
    #7
    I think you have to set "Put the display to sleep when inactive for" to "never".

    Although this is annoying to have to do each time you want to watch a film. I'm sure Apples DVD player does this for you. But I use VLC and stuff on YouTube and have to constantly flick the mouse to stop it dimming.

    So IMHO it's a valid question.
     
  8. irishgrizzly macrumors 65816

    irishgrizzly

    Joined:
    May 15, 2006
    #8

    That's what I'm needing then – how come I've never seen this!?
     
  9. dpaanlka macrumors 601

    dpaanlka

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    Nov 16, 2004
    Location:
    Illinois
    #9
    Seen what?
     
  10. coolurjets thread starter macrumors newbie

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    Mar 20, 2007
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    UK
    #10
    Thats done the trick although now it never dims, and a warning came up saying it would serverly shorten the life of my monitor. Ah well... Can't have it all I guess
     
  11. caMi macrumors regular

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    Sep 13, 2007
    #11
  12. coolurjets thread starter macrumors newbie

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    Mar 20, 2007
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    UK
    #12
  13. caMi macrumors regular

    Joined:
    Sep 13, 2007
    #13
    Keep hoping... I don't think apple wants to fix the problem.
     
  14. raysmd macrumors member

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    Sep 4, 2007
    #14
    Is there a hot key to just blank the screen at will (i.e., turn off LCD)
     
  15. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #15
    You might be able to fix that with a login script. The auto-dimming distraction can also be turned off from the terminal.app command line:

    sudo pmset -a halfdim 0

    It would be a snap to automate -- if not for the superuser-only restriction. I haven't had any motivation to fiddle with it, because I almost always have the brightness turned down to minimum -- where "halfdim" has absolutely no effect.

    LK
     
  16. nickf macrumors member

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    Oct 2, 2007
    #16
  17. anemone macrumors member

    Joined:
    Jun 5, 2007
    #17
    another option

    This is what I use while watching something or while on a Skype call:

    Caffeine: http://www.macupdate.com/info.php/id/24120

    Basically it puts a little "zzz" icon in the top right menu bar area. You click on it (which puts an X through the "zzz") and your screen will not dim or go to sleep. Click on the zzz's again to turn it off.
     

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