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How do I tell Lion to disable the LCD screen even when the lid is open?

Hello,


A known issue with MacBook Pro's is that the WiFi reception is poor when running in clamshell mode. A workaround for this issue when using an external monitor only has been to close the MacBook, wake it with a USB device and monitor attached, and then re-open the lid.


Unfortunately, this doesn't work in OS X Lion. That's because as soon as you open the lid, Lion re-detects all the displays and re-enables the LCD monitor. I'm sure in some circumstance, that's very helpful. But not in mine.


Does anybody know of a way to keep Lion from re-enabling the monitor whenever the lid is opened?


Thanks!

MacBook Pro, Mac OS X (10.7)

Posted on Jul 20, 2011 12:44 PM

Reply
383 replies

Jan 10, 2013 1:59 PM in response to code.samurai

I haven't been able to test this, but I used Apple's sample code for a full-screen app to make a dummy app that launches in full screen. If anybody would like to try it, it should be available for download here:


https://www.box.com/s/wy1v7j2hpxvrps3z44de


The app will just launch a graphic of a spinning globe in full-screen, so you can try the steps from code.samurai, et al., [above], without having to run a game. Good luck!

Jan 12, 2013 6:54 AM in response to ehdonhon

Hello everyone


I have created a small program to fix the issue per sesssion:

http://www.seph.dk/blog/uncategorized/clamshell-mode-with-open-lid-in-mountain-l ion/


Once downloaded: Close the lid. Launch the program. Open the lid. Press escape.


The method is the same as the one code.samurai mentioned. This is a replacement for launching an entire game.


Regards

Seph

Jan 12, 2013 2:27 PM in response to scarlac

Seph, it simply refuses to launch with a popup saying "You have OSX 1.7.5. This application requires OSX 10.8+"

I never built an OSX app before, but I'm a developper so this shouldn't be that complicated. If you're ok to share your source, and maybe some guidelines to build it, I can give it a try.

my email laurent.chaply at gmail.com


Laurent

How do I tell Lion to disable the LCD screen even when the lid is open?

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