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View Full Version : Can you disable Macbook Pro screen and only use the external screen with Lion OS?




JazzLion
Sep 13, 2011, 03:55 AM
Can you disable Macbook Pro screen and only use the external screen with Lion OS?



Canaan
Sep 13, 2011, 03:58 AM
I know that if you close the lid and have it hooked up to the power adapter and use a peripheral to wake it up then it just uses the external. However I have yet to figure out a way of keeping the lid open and doing this. :cool:

marc11
Sep 13, 2011, 06:12 AM
Right, best you can do is dim the screen to black with the lid open.

smj996c
Sep 13, 2011, 06:53 AM
Can you disable Macbook Pro screen and only use the external screen with Lion OS?


Close the lid and it will be automatically put into clamshell mode, or if you want to keep the lid open with no display go into display preferences and turn off mirroring.

iL15hts
Sep 13, 2011, 10:31 AM
Close the lid and it will be automatically put into clamshell mode, or if you want to keep the lid open with no display go into display preferences and turn off mirroring.

If you close the led, is there no heating problem? coz your closing the fan window

tjb1
Sep 13, 2011, 10:43 AM
No air goes through the keyboard, the keyboard is sealed from the motherboard with a layer of plastic.

JazzLion
Sep 14, 2011, 07:02 AM
I know that if you close the lid and have it hooked up to the power adapter and use a peripheral to wake it up then it just uses the external. However I have yet to figure out a way of keeping the lid open and doing this. :cool:
Thanks, guess this is the only solution.

marc11
Sep 14, 2011, 07:13 AM
OSX Daily just posted a terminal command that will disable the screen. Check it out.

iL15hts
Sep 14, 2011, 09:16 AM
No air goes through the keyboard, the keyboard is sealed from the motherboard with a layer of plastic.

i thought the air is coming out to the back bottom of the lcd (the black plastic), correct me if im wrong.

wikus
Sep 14, 2011, 09:30 AM
OSX Daily just posted a terminal command that will disable the screen. Check it out.


Some MacBook Pro or Air users may want to disable their internal screen when the laptop is connected to an external display, this is generally achieved in two ways but since Mac OS X 10.7 the internal screen is more persistent and wants to stay on.

To disable the internal screen for OS X Lion based laptops, launch the Terminal and enter the following command:

sudo nvram boot-args="iog=0x0"

You’ll need to reboot for changes to take effect, and the internal display will then be completely disabled regardless of whether the Mac is open or closed.

To undo this, you can go back to the Terminal and enter:

sudo nvram -d boot-args

Then reboot again, or you can just zap PRAM by holding down Command+Option+P+R during reboot, which clears out the boot-args as well. If you were to disconnect the MacBook Pro from an external video source, zapping the PRAM would be how you’d want to reenable the internal display.

This is the opposite of “clamshell mode” – where the Mac laptop is closed and the screen is still turned on. Clamshell can look nice, but without adequate air flow the Mac may overheat, thus running the computer with the display open is recommended. If you’re going to do this, be sure to set the primary display so that the menubar, Dock, and alert windows go to the proper screen.

I think a better solution to this was if Lion turned off the display completely when the brightness is set to zero. Saves energy, optimizes the video card speed, allows airflow and eliminates the need to reboot the laptop for changes to take effect.

danpass
Sep 14, 2011, 09:35 AM
http://forums.macrumors.com/showthread.php?t=1222142

JazzLion
Sep 16, 2011, 12:40 PM
Sweet, exactly what I wanted to do =)

Thanks guys!

kurtfm
Sep 22, 2011, 11:20 AM
This is actually a better solution than I thought it was going to be. Based on some other posts I guess I thought it was going to completely disable my internal monitor so when I rebooted I saw my internal monitor come up and thought it was not working. Basically this works the same as 10.6. As others have said you just close, let it sleep, wake... then open the lid. If you want to enable your internal macbook display again use the 'Detect Displays' in your display preferences.

Folks at my work don't understand why I like to do this either. Here are my reasons:
- main reason = the app menu at the top will only show on the main macbook display.... not very intuitive when I want to use the larger monitor for most of the work (if I could make my macbook my secondary type display that would be a good solution for me)
- big external monitor = don't really need more real estate... multiple desktops helps keep me organized
- I find two different size displays uncomfortable to use at times
- need to use the camera so I don't want to just keep the lid closed
- I don't care where the air is coming from... the fan runs more with the lid closed

there are other reasons but those are the main ones

phyrexia
Sep 22, 2011, 04:54 PM
Folks at my work don't understand why I like to do this either. Here are my reasons:
- main reason = the app menu at the top will only show on the main macbook display.... not very intuitive when I want to use the larger monitor for most of the work (if I could make my macbook my secondary type display that would be a good solution for me)

I am surprised by how many people don't realize you can switch which display is your "main" display by dragging the title bar from one display to another in the Displays section of System Preferences. It's in the same pane as the orientation settings. The option only appears when you have a second monitor plugged in. Furthermore, the computer remembers this and if you reconnect your external display, it automatically switches the Dock and the Menu Bar to the external display.

I hope you find this information useful. :)

johnhurley
Sep 22, 2011, 07:04 PM
I am surprised by how many people don't realize you can switch which display is your "main" display by dragging the title bar from one display to another in the Displays section of System Preferences. It's in the same pane as the orientation settings. The option only appears when you have a second monitor plugged in. Furthermore, the computer remembers this and if you reconnect your external display, it automatically switches the Dock and the Menu Bar to the external display.

I hope you find this information useful. :)

Thank YOU! I like this! It helps a lot!

iThinkergoiMac
Sep 22, 2011, 08:51 PM
i thought the air is coming out to the back bottom of the lcd (the black plastic), correct me if im wrong.

Yes, and that vent is unaffected by whether or not the lid is open. If anything, the vent is MORE open when the lid is closed than when it is open.

tjb1
Sep 22, 2011, 09:03 PM
Yes, and that vent is unaffected by whether or not the lid is open. If anything, the vent is MORE open when the lid is closed than when it is open.

Actually it would be more open with the lip open because it can flow up also but closing the lid has little effect on the air flow as long as the computer is on a HARD surface.

raftr
Oct 24, 2011, 11:40 AM
I have a weird issue with clamshell mode in 10.7.2

MacBook Air i5 1.7 and Apple Cinema Display 30" connected with Apple Mini DisplayPort to Dual-Link DVI adapter.

When I restart the computer, lid closed, it only sees the main 30" display, which is the desired behaviour—all good so far.

Then I put it to sleep, wake it up… and the computer suddenly sees two displays, despite the lid being closed. There is no way to get rid of the second display unless I restart the computer again. It is ridiculous.

I tried the Terminal trick, it did nothing but put the computer in "sleep, wake, wait 5 seconds, sleep again" loop. Bizarre.

iThinkergoiMac
Oct 24, 2011, 05:52 PM
Actually it would be more open with the lip open because it can flow up

Nope. When the lid is open, the air can't really flow down because the lid is in the way. Plus the lid also blocks the side vents when it is open and doesn't at all when it's closed.

Then I put it to sleep, wake it up… and the computer suddenly sees two displays, despite the lid being closed. There is no way to get rid of the second display unless I restart the computer again. It is ridiculous.

What happens if you open the lid and then close it again after this happens? Also, do you have an aversion to running two monitors? It gives you more space...

raftr
Oct 24, 2011, 06:05 PM
What happens if you open the lid and then close it again after this happens?


The laptop screen is on at first (closed!) then, when I open it fully and close again, it goes off. It is still visible as an active screen in settings, I can drag windows to it, reposition it and so on. Only a restart fully disables laptop display.


Also, do you have an aversion to running two monitors? It gives you more space...


A monitor and a laptop combination is not really the same thing as two monitors standing side by side, it's not very usable for me.

Besides… it is a 30". If someone says they need more screen estate than that they have bigger problems ;)
I am sometimes still overwhelmed by this display even though I have good reasons to own it—use it for graphic design/web development.