Turn off external display output?

I've bought a nice big LCD TV mainly for consoles. Because I have it next to my iMac i've also connected that to the TV using a mini-dvi adapter and a dvi-hdmi cable.
It works great but I only want to use it for playing downloaded video and the like on the big tv.
When I'm not using it I want my iMac to free up the resources it must be using to achieve screen spanning but I cannot figure out a way to tell the iMac to disable external display output.
I've tried display mirroring figuring that it won't be eating up video RAM, but it causes page tearing on my mac when dragging windows around for example.
Even when the TV is unplugged from the mains the mac seems to be outputting to the dvi out, the only way to stop it is the yank the mini-dvi connecter from the back.
Are there any hacks or utilities that can manually turn dvi support on and off?

Hello Mark
I'm using a 27" flat screen TV, mini DVI and 12' S-Video cable.
Mostly I watch DVD movies on that Display while working at the iMac's 17" it's also great for iPhoto Slideshows and PowerPoint.
Not to worry the TV supports it's own display and all you are doing is sending a signal to it's video card. Just turn it off or change the channel.
I tend to stay away from mirroring for the same reasons, but also because the TV's across the room.
Again not to worry the TV supports it's own display and all you are doing is sending a signal to it's video card. Just leave it connected up to prevent damage to DVI port, Adapter and cable. "yank not"
Just be sure to gather up all your windows back to the iMac Display befor shutting off or changing the channel.
Dennis
17" iMac Intel Core Duo 1.5GB Ram Mac OS X (10.4.9) Maxtor 300GB FireWire Creative Inspire 2.1 2G Nano

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How to turn off external display?

Hi,
Does anyone know if there is a way to turn off a second display without unplugging the hdmi cable. If it can be done programmatically, then that would be great.
There is a bug where if you shut down and restart, then mission control adds the second display to the main display.
Thanks,
kel

hey i might be able to help you out
a few things you should know i have my phone set to turn off my backlight after 20 seconds... also i do not use the bedside mode it just dims the screen...
you can change this in your options under screen/keyboard
now then to turn off your external display while your charging you phone go to your home screen and select you clock
then push your menu button and select options
the under the the CLOCK tap it should say: WHEN CHARGING... set that option to DO NOTHING...
and there you go i hope this helps...
~HaZe42o~

Satellite M500 - Closing LID turns off external display

I just bought a new M500 today. I use a 46" TV as external display. When I close the lid the external display goes off and the laptop hibernates.
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Hello
This is only an option that you have to change in Windows Power Management. Go to power options and select the power profile that you are using. Edit the plan and scroll down until Power buttons and lid => Lid close action. Change this option to do nothing. With Apply and OK you save this settings.
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Turn off external displays without unplugging them.

Hello,
I would like to have my TV plugged into my Mac 24/7 but not actually use unless I want to. Is there a way to turn off the use of the display while it is still plugged in? Kind like Window's option to tell it that one is attached?
Thanks!

Yes and no. First, there's no such feature in Windows - quite the opposite (there's no option to enable such a thing).
In OS X, you can manually mount a filesystem with the sync flag from the command-line (not from Finder), which will sync all writes to the filesystem. This is good and bad. It's good in that you have a decent chance that all data is written to disk before you yank it out, bad because you can't buffer writes, so disk performance suffers severely.
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How can i turn off my display?

Hi everyone, so, i`m using my MacBook Pro with one Samsung T220 Display, and i want to turn off the display of the MacBook when i get out, like i make with the samsung, only click até thw power button, and that`s it, turn off. How can i do the same thing with the MacBook Display and turn off the display when i want and don`t using the screensavers? Thanks a lot, sorry for my english, i`m learning.

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http://support.apple.com/kb/HT3131

Turning Off the Display

Hi,
Is there a way to turn off the display manually? I use flight simulator a lot and there is motion on the screen so it won't turn off automatically. I was hoping there was a key command or something I could use to turn it off when I left the game running for a little.
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Fn+F3 turns off the display(s) selected with Fn+F7.
But with motion on the screen it won't stay turned off.
Also hitting Fn+F3 will end full screen mode and return FS to a window which I think pauses it. If you know of a way to continue running FS in a diminished window Fn+F3 would work. Otherwise I think only way is to use Fn+F7 to select an external monitor only and then power off that monitor when you want to leave FS going.
Message Edited by zilla on 2009-05-29 07:43 PM
T500: Vista 32, 2.8GHz, 4GB RAM, 15.4" 1680x1050, 500GB 7200rpm, ATI Radeon HD3650 + Intel 4500MHD. T42: XP, 1.7GHz, 2GB RAM, 14.1" 1024x768, 250GB PATA, ATI Radeon 7500.

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For when I am watching a movie, or a tv show on my MBP to my television. I dont like having the LCD screen on, wasting its life away.
If I tell the MBP to turn off the display after a minuet, (in power settings) will that leave the TV out on?
If there is anyway to do this, thanks.

While it is connected to the TV, put the MBP to sleep by closing its lid. Now, wake it up again, not by opening it, but by use of an external USB device like a mouse. This will cause only the TV to be active. Once the TV lights up, you can open the lid on the MBP if you like and the screen will remain off.
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Hello @duleNS
To get your issue more exposure I would suggest posting it in the commercial forums since the HP EliteBook 8770w Mobile Workstation is a commercial product. You can do this here Notebook - HP ProBook, EliteBook, Compaq, Slate/Tablet PC, Armada, LTE
The support page for your product may be helpful in the meantime: HP EliteBook 8770w Mobile Workstation.
I hope this helps!
Thank you for posting on the HP Forums.
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

Creative Zen 4gb, is it supposed to turn off the display to save the batte

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Cant edit powersetting for laptop to turn off the display after .. when power is plugged in

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Hi，
Are you referring to this?
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Turn off external display output?

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