Closed Macbook Pro with external monitor?

Discussion in 'MacBook Pro' started by Necco, Jan 19, 2008.

  1. macrumors member

    Jan 19, 2008
    Frankfort, Illinois
    I've been considering for quite a long time purchasing a monitor that has better resolution and larger than my macbook pro's 15 inch. The problem is, every time I plug my Macbook into the monitor i have right now and close it to keep it out of the way the display turns off and the external monitor is useless.

    Is there a way to just turn off the display on the macbook pro and close it but keep it running normally. In other words, can I turn my macbook pro into a normal computer without the monitor?

    Let me know if this is hard to understand and I'll try to word it better. It's hard to word really.
  2. macrumors 68000


    May 3, 2007
    In front of my MacBook Pro
    Connect the monitor. Close the MBP. Wake up the MBP with an external KB or mouse.
  3. macrumors 68020


    Aug 30, 2006
    Once you've closed the lid, you can use an external keyboard and mouse to bring the computer back to life with the lid shut by pressing any key on the keyboard. :)
  4. macrumors regular


    Mar 20, 2007
    Why this tips doesn't work for me? I was connect my external monitor and usb keyboard and try to close the MBP and the MBP go to sleep, after that I try to click my mouse or by pressing any key on my keyboard but, nothing happen :(

    Please what's going on? and how to do this?
  5. macrumors member

    Dec 27, 2007
    I had the same problem. Make sure your external is connected. Take a USB device and unplug it/plug it in. Either action tells the computer "Hey! Wake up, I got something for you!".

    This method had been working quite well for me for a week. My computer kernel paniced. I restarted and now I can't get it to work that way. I wake the computer up, but now it just goes right back to sleep.

    Any ideas?
  6. macrumors 6502

    Feb 14, 2008
    If you've got an Apple remote, that will wake up the machine as well with the lid closed.
  7. macrumors 603

    Feb 4, 2008
    Hold the escape button after it goes to sleep. After 5-10 seconds, mine almost always comes back on.
  8. macrumors 6502

    May 24, 2007
  9. macrumors 68030


    Oct 17, 2007
    Fort Worth, TX
    it can be tricky sometimes...even when you have an external keyboard and mouse hooked up, you close the MBP and then try to wake it, and it won't wake...I started having this problem after 10.5 but it's disappeared with 10.5.2 and graphics update. Sometimes a reboot of the system will help.

    Good luck!
  10. macrumors 6502

    Feb 14, 2008
    One other thing that I've noticed is that with my KVM switch, I am unable to wake the machine with a keystroke or by clicking a mouse button. So I end up plugging in things in this order when I get to work in the AM:

    1. Monitor
    2. Network
    3. Sound
    4. Power
    5. USB

    Plugging in the USB device does wake the machine (as a previous poster said). It will be fabulous when they build a docking station for the MBPs.
  11. macrumors member

    Dec 27, 2007
    Appreciate the info guys. The thing is plugged in to an outlet.

    It is strange because I haven't had any problems like this with it until it kernel panicked...Something that was already set must have reset because of an improper shutdown...

    Anyway, I know in the display settings sometimes it identifies my monitor as "P221W" (I suppose is default for this monitor) or "Monitor 2". Don't know why.

    I don't want to get an app to do this as it is native to OS X, I just need to reconfigure/fix it. But if I have to, know of any apps that could allow me to work on an external with it closed.

    More importantly, any other ideas on how to fix the problem?
  12. macrumors regular


    Nov 14, 2007
    Big Sky, MT
    This has worked for me... with your MBP off and external monitor plugged in, lift the lid on the MBP, push the power button and then immediately close the lid. The unit should boot properly to the external display. After this, if you want to use both displays, just raise the lid again and go in to system preferences, displays, and hit detect displays. Your MPB should now recognize both displays properly. This work around has worked for many people since the latest graphics update. YMMV
  13. macrumors member

    Dec 27, 2007
    dmarch, your idea worked great!

    i hit the restart button, closed the lid after i heard the start tone (i was not paying attention), waited for something to happen...i got impatient lifted the lid and it kernel panicked. ok little annoying....

    turn it off...back on quickly shut lid. display lights up, no problems.

    so weird that it would glitch out like that. anybody have any kernel panic errors from external monitor usage? the only other thing that may have caused the panic was my firewire...but i don't know why that would do it.
  14. macrumors newbie

    Dec 17, 2007
    This worked for me.

    1. Put the monitor is in extended display mode (or mirror it does not seem to really matters after laptop LCD is disabled).
    2. Plug in USB Key board (doesn’t matter if it is done before or after closing laptop).
    3. Close Laptop.
    4. Wait for a seemingly long time (50-55 seconds) until the LCD lid light starts to pulsate between brightnesses back and forth – removing the power cable does not speed things up – but if it is removed – you need to plug it back in order to wake it up again).
    5. Wake up laptop by hitting keys on keyboard of moving mouse.
    How do I turn the LCD laptop display on again? In display system preferences hit the ‘Detect Displays’ button.

    Maybe there is a way to shorten the 55 second wait time?
  15. macrumors 6502a


    Aug 31, 2008
  16. macrumors newbie

    Dec 17, 2007
    Removing the 55 second waiting time...

    I learned how to more quickly remove the waiting time to disable the laptop LCD - and that is to turn off "safe sleep". Safe sleep saves an image of main memory onto disk if you loose all power (e.g., ., you are not plugged in and have no battery power left). This is partly from and works nicely.

    1. Check your current mode:
    {thyme:627} pmset -g | grep hibernatemode
    hibernatemode 3​

    For MacPro books after 2005 the default should return a 3, Mode 3 keeps your RAM powered during sleep to allow super fast wake-up, but also writes an image file of all memory onto disk in case power is lost. The writing slows the wait for it to disable the screen.

    2. If the above is 3, change it so it doesn't create an image file, but switching the mode to "0" (zero). In a Terminal window:
    sudo pmset -a hibernatemode 0
    Enter your password when asked to do so. This prevents Safe Sleep from saving your memory contents to disk, in large part the cause of not being able to wake MacBook’s from sleep.

    That is it! Now my previous post steps work without the 55 second wait. :)

    InsomniaX worked for me as well by keeping the display on while the laptop being closed. So it is probably a matter of preference if you want the display on or off.
  17. macrumors newbie

    Jan 8, 2013
    It works! try my method

    Ok guys after messing around with external display and macbook pro display i finally got it to work with closed macbook pro and just using external display (Im using samsung 1080p display).

    Connect everything hdmi, usb if you have it, THEN make sure you plug in your charger. Then try closing the lid of macbook pro and volia!! Your welcome. hope this works! leave comment if it doesnt.
  18. macrumors demi-god


    Oct 6, 2009
  19. macrumors member

    Aug 9, 2008
    little late? :p
  20. macrumors 6502a


    Oct 6, 2011
    it's nice that you wanna help but I guess it's probably too late. It's likely that the OP is already dead :p

Share This Page