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Join Date: Apr 2009
11-02-2009, 05:35 PM
I had the same problem. After a bit of searching on this site, it seems there was a command line app to turn mirroring off in DellEFI which is no longer present in NBI.
How I fixed things:
1. Found a copy of DellEFI (I had one downloaded anyway, but there is one in this forum article: DellEFI 1.1 Final )
2. Navigate to where you saved it, and CTRL-Click and select "Show Package Contents"
3. Navigate to Contents/Resources/Extra/bin/ and copy the file "mirroring" to your home directory.
4. Open terminal, and type "./mirroring" without the quotes. You should get the response
Usage: ./mirroring <on|off>
5. Keep the focus on the terminal window, and plug in your external monitor, wait for it to settle down into the pattern of colours and lines.
6. Type this carefully, which assumes the terminal window still has the focus!
./mirroring off <enter>
- that should switch off mirroring for you!
Join Date: Sep 2009
Location: Jersey City, NJ
11-02-2009, 06:55 PM
Another way, in theory if you reran NBI and selected the "old mirror friendly GMA support" you should be able to then deselect "sync displays" and then run NBI again and deselect the "old mirror friendly GMA support".
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