External DVI monitor while on battery?

Most of the time I have my powerbook closed and I use a USB keyboard/mouse and a Dell 21" DVI monitor.
I noticed my battery was showing the forever "calculating" and I thought that was strange because the PB is only a couple months old.
Well for grins I unplugged the power adapter figuring I would run on battery for a while. I was quite shocked to see my video on the Dell display disappear and since the lid was closed the PB basically went to sleep.
At first I thought the battery was toast or something. But opening the cover revealed a nice login to unlock from screen saver.
I did that but video was only on the PB display and not the Dell. I enabled mirroring and that worked to get the Dell alive again but not quite at the resolution I was using.
I had to reboot and reset everything back to use the external monitor but I'm really curious why it couldn't drive the external Dell monitor while on battery? Is that normal?
Mark

According to this article, that is normal:
http://docs.info.apple.com/article.html?artnum=88064
It says it is this way because of the increased power demands...

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What do I need to hook up an external DVI monitor to Thunderbolt?

I want to hook up an external DVI monitor to my new iMac.
It has a thunderbolt connection.
http://www.amazon.com/Apple-Mini-DisplayPort-Adapter-MB570Z/dp/B001IF5YLQ/ref=sr _1_1?ie=UTF8&qid=1309558497&sr=8-1
Is the above link what I would be looking for? I notice this is for "Mini DisplayPort" and not Thunderbolt?
Just a little confused Thanks.

You are quite correct. That's the device you need. Take a look at your plug and the plug in Amazon's picture for a final check. If that looks good, click "buy"!
ThunderBolt supports "mini display port".
Since adapters have been around for a while, they typically don't say anything about ThunderBolt - it's too new. They talk about "mini display port" only.

Macbook pro retina 13" 2 External DVI Monitors

All,
Has anyone successfully used 2 External DVI monitors on a 13" retina Macbook Pro? I would like to use both Thunderbolt ports if possible, one for each monitor with 2 mini-display/thunderbolt port to DVI adapter.

Remove Chrome (and Google Drive if you have it). Higher temps when using Netflix are normal, Silverlight (which Netflix uses) is a resource hog, get used to it or stop using Netflix.
Let's see what else you are running. Download a copy of Etrecheck and run it. Post the report here.

I have a MB Pro that is running Lion; I also have two external DVI monitors and a DVI splitter in hopes that I could run the two monitors with my MB Pro. This actually works fine, but I am unable to "extend" the desktop. Any insights?

I have a MB Pro that is running Lion; I also have two external DVI monitors and a DVI splitter in hopes that I could run the two monitors with my MB Pro. This actually works fine, but I am unable to "extend" the desktop. Any insights?

You cannot have a extended desktop using a splitter. All that does is mirror the pair attached to the splitter.
You can do this however using a Matrox DualHead2Go.
Other solution would be to attach one monitor to your video out as you do the splitter and attach the other via USB (assuming the adapter supports the monitor's resolution).
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I recently purchases a 27" iMac and i'm trying to get it working with a 3rd party DVI external monitor. I got the Apple mini display port (thunderbolt) to DVI adapter and connected everything via a new DVI-D cable. The iMac detects there is a monitor and even shows the display as it should.. however, the monitor has a large amount of static/snow/noise (red coloured), so much so that the monitor is unusable. There is also a considerable amount of flickering.
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Also, the monitor connects fine to the iMac when using a mini display - VGA adapter. The problem really seems to be with the combonation of DVI cable and adapter.
Has anyone had any experiences with DVI monitors connected to new iMacs via the thunderbolt port?
(System: iMac 27" 2011, 3.4GHz i7, 16GB RAM, Graphics AMD Radeon HD 6970M 2GB. All system updates installed, running OSX 10.7.2)

I think that your assessment is right, the ATI must be on for DVI to work (so far I've only tested with an older T61p and the Quadro graphics are always running). Can't you set the machine so that when docked the ATI is used, but on battery the internal video is used? That would be what I would try.
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formerly x23, x40

2 x DVI Monitors on i7 Thunderbolt Macbook Pro?

Is this possible?
I have a Dell 1908Fpt DVI Monitor (with a Thunderbolt to DVI adaptor) and an older 20" Cinema Display with DVI.
I have the Macbook Pro i7 with just a Thunderbolt socket.
Is there anyway to have both monitors playing and connected as well as the Macbook Pro screen open?
Would I need a Thunderbolt to double DVI sockets?

You could purchase 2 mini displayport to DVI adapters ($30 ea) and use the 2 Thunderbolt ports. I have one external DVI monitor connected to 1 of my Thunderbolt ports. Works great!
Sorry my mistake. You said non-Retina.

MBP and dvi monitors

Hi,
Forgot to ask - can I hook any brand name external DVI monitor up to my MacBook Pro without any additional adaptors or cables?
Will it run in dual monitor mode automatically or will it simply mirror the MBP desktop ?
Thanks

Hall Palm Desert,
if your Mac monitor has Thunderbolt ports, and the PC monitor is on the end of the daisy chain, then you might be able to do it by connecting your PC monitor’s VGA cable to a Mini DisplayPort-to-VGA adapter (e.g. Apple, NewerTech), connecting that cable’s Mini DisplayPort end to one of the Mac monitor’s Thunderbolt ports, and then connecting a Thunderbolt cable between the other port on the Mac monitor and your MacBook Pro.

Can i use multiple dvi monitors on the 2012 macbook pro (non-retina)?

What is the best way to connect two Dell DVI monitors I already have with my new 15" MBP (non-retina)?

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Sorry my mistake. You said non-Retina.

External TV Monitor use while editing HDV

I would like to use an external TV monitor to mirror my timeline while editing in HDV and I understand from reading past posts that I cannot do that without a
capture card such as the Blackmagic Decklink HD Pro (dual link) PCI-X. I am willing to purchase this card if it will work with my setup and JVC BR-HD50 deck. Is anyone out there working with this card and deck? I will appreciate any info that anyone can give me.
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You'd still capture via FireWire, but monitor externally using the capture card in the scenario you describe to work in HDV... It would also allow you to control the deck via it's RS-422 (better control than via FW) Also, with the right converters you could upconvert the HDV to uncompressed HD which works quite nicely if you have a fast enough array attached for this.
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Why did my external HD monitor go blank after working fine while hooked up to a new MacBook Pro?

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could be, try powering down the mac, with the exmonitor connected and see if it is recognized

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Hello, Apple Support Communities.
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Nevermind. I found solution. Though it cost me 24 bucks.
Now Apple is seriously making me to consider to roll back to sucking Windows.
Thanks Jobs!

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Stackhouse wrote:
Could a defective card cause the performance issues I had, but seemingly only when I have an external monitor connected?
Yes. Contact Apple using the links in the kbase article you mention.

Is it possible to view on an external monitor while working in DVDSP ??

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Ken

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External DVI monitor while on battery?

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