Does mirroring output two resolutions simultaneously or one?

Hello everyone,
First time Mac Book Pro user here. I've been doing some research on the whole "turning your internal display off and keeping your external on" for heat and performance issues. While I know there isn't anything conclusive yet to do this, I was just wondering if when you mirror instead ofe extend (say to a TBD), is the GPU still driving two resolutions? Two 2560x1440s ? or Just one and doing just that: Mirroring it. Is there any performance gain from doing mirroring instead of extending?
Thanks!
-Kevin

Hey,
I believe it's possible. I've read about it a while ago I believe. You need to patch your Xserver I think. A good thing would to ask a question on the Xorg-list on this if you use Xorg, Xfree86, ... There is an irc-channel for xorg I believe.
I would first advice you to do the above thing(s) ...
Maybe I found a reference ...
Here is an extract from it:
There is a HOWTO at tldp.org. Look for XFree local multi-user.
The ruby (backstreet ruby for 2.4.x kernels) kernel patch allows interception of events from multiple keyboards to be bound to specific virtual terminals. The latest XFree and Xorg Xservers are now including this ability with the isolateDevice config file option. Older X servers need to be additionally patched. Basically, you craft an X config file to bind specific mice, graphics cards and monitors to their own screen layouts. Of course there is more to it than this. One accepted method is to alter the hotplug subsystem to automatically create your added devices, then you supply symlinks and binding instructions to the device addresses with config files. Keyboards are another matter. They are handled through the ruby patch. Using a 2.6.x kernel, the controlling terminal is assigned the use of virtual terminals 1-17. The next x screen is number 18, etc. The second keyboard, VT1, is automatically bound to the second x screen, VT18. This is of course oversimplified, and yes I've read that this method should work with up to 16 layouts!
What the multiseat package does I don't know. I will try it out this weekend. As far I have researched, it makes it easier to find and configure the several config files you need. If some one knows, please post.
I also foudn this link:
http://cambuca.ldhs.cetuc.puc-rio.br/multiuser/
Michel[/code]

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"markwysong" wrote in message
news:[email protected]..
> Chang-Kwon,
>
> I believe that your problem doesn't really lie in the fact that you
> have two loops, I think it is rooted in how you are doing your data
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>
> First, let me make the assumption that you are using buffered
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>
> The way to get around this is to use the DAQ occurrence VI. This VI
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>
> Hope you understood that. Let me know if I can help you further.
>
> Mark

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