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ehdonhon Level 1 Level 1



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?



MacBook Pro, Mac OS X (10.7)
Solved by chenga.8 on Aug 31, 2011 6:56 AM Solved

Here's the command to make your laptop behave like it did Pre-Lion (courtesy of my friend):


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


Works perfectly for me. If it screws up your system, just zap the PRAM next boot (cmd-opt-p-r) and you'll be back to the default Lion state. Or if you can still get into terminal, this command will get you back to Lion's default state as well:


sudo nvram -d boot-args



Reply by tjk on Jul 20, 2011 2:27 PM Helpful

Apple wants to hear your suggestions:

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