External Display - Clamshell Mode

Discussion in 'MacBook Air' started by minnus, Sep 22, 2011.

  1. minnus macrumors 6502

    Aug 12, 2011
    Just a quick question - I am currently using the 2011 Air in Clamshell mode on my U2410. Whenever the Air sleeps the display, the monitor turns black with the backlighting still on. This is rather strange, since the U2410 should go into standby when it stops receiving a signal.

    Is the Air still 'using' the monitor when it sleeps the display? Are there any settings that can be toggled on the Air?
  2. jamesr19 macrumors 6502

    Nov 7, 2009
    Are you sure the power is plugged in? Usually that causes the laptop to go to sleep when the lid is closed but you get two displays when the lid is open as normal
  3. minnus thread starter macrumors 6502

    Aug 12, 2011
    Sorry - I wasn't very clear.

    Clamshell mode works great, with the exception that after a period of time set in Energy Saver, the display sleeps - which is great, except it doesn't trigger my monitor to standby and thus using a lot more electricity than necessary.
  4. macgeenius macrumors newbie

    Sep 23, 2011

    What type of cable/adapter did you use for hooking up to your U2410 monitor?

    I have a 2011 MBA 13inch i7. I'm currently using a Belkin Mini Displayport to HDMI adapter to connect to my U2410. The text is fuzzy, and I find it is quite annoying.

    I ordered from Monoprice a Mini Displayport to Displayport cable, hoping that this will make my U2410 work better with the MBA.
  5. minnus thread starter macrumors 6502

    Aug 12, 2011

    I am also using a Mini Display to HDMI adapter. I found that the reason why it is fuzzy is because the sharpness is off in HDMI for some reason. If I attach an HDMI to DVI at the end of the HDMI cable, everything is clear.

    I also ordered a mini display to displayport - hoping that it would solve my sleeping problem.

    Using just HDMI, the monitor goes into a cycle of "power saver" and regular mode right after one another - so it just turns off and on continuously.

    Are you experiencing the same power saver behavior by chance?
  6. minnus thread starter macrumors 6502

    Aug 12, 2011
    Ah, the U2410 sleeps proper when using a Mini-Displayport to Displayport adapter. It also does not require you to adjust the sharpness like you do with HDMI -- seems like Displayport is the winner!

    Connected to my projector, the HDMI adapter works fine though.
  7. EggyWeggs macrumors newbie

    Oct 20, 2011
    Hi, so you purchased the MDP-to-DP *adapter*? And then you used the provided Dell cable? Can you link to the product you ordered?

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