Trouble getting out sleep mode with external display

My 15" ALPB si connected in closed mode to a Viewsonic external monitor. When not used for a while, the Powerbook will of course get to sleep. But then there is no way to make it wake up again. Disconneting screen and other devices won't help. Only a restart will do, thereby losing all ongoing work. (BTW, never had this problem with a 12" ALPB also connected to the same type of display).
I know that by removing the monitor shutdown option in the energy saving preference panel it will dissapear. But I really need the display sleep option to work.
Someone experiencing this problem? Any solution?
Thanks. Mark

Thanks for your suggestion. That's actually a workaround I've used. The only problem is, the display isn't really put to sleep. The result: I still get an extended desktop and occasionally I "lose" my pointer. A bit annoying, but thus far the only solution I've come up with.

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Extended desktop mode with external display

I use my Macbook with an external display. Sometimes I need to use extended desktop mode and sometimes I don't need the extra desktop space and prefer to work only with my external display. My needs change as I work throughout the day and I'm getting tired of having to close the Macbook to put it to sleep and then wake it up without opening the lid to just have one display (the external one).
I'm wondering if anyone knows if there's a way to put the Macbook built-in display to sleep while continuing to work with the external display, without having to put the Macbook to sleep first. I'm thinking that there's got to be a way to do this (maybe there's a piece of software out there or some other work around?).

Thanks for your suggestion. That's actually a workaround I've used. The only problem is, the display isn't really put to sleep. The result: I still get an extended desktop and occasionally I "lose" my pointer. A bit annoying, but thus far the only solution I've come up with.

Solution for sleep issues with external display?

I had an Early 2011 Macbook Pro that worked quite well with an external display. I now have a Mid 2012 Macbook Pro (bought 5 days ago, and running 10.10.3) that will not consistently work with the same external monitor.
I had it working yesterday for a few hours only if I left the MBP with the top open (both the MBP screen and external monitor stayed lit). But, today it is back to freezing each time the monitor is connected to it.
I have tried:
1. Connecting the external monitor to the MBP with the top open. Results in the MBP screen now going dark and no signal being passed to the external monitor. If the external monitor is disconnected, the MBP screens stays dark and the computer is unresponsive requiring a hard restart.
2. Connecting the external monitor to the MBP with the top closed. Results in no signal being sent to the external monitor. Disconnecting the external monitor and reopening the MBP yields, again, and unresponsive computer which requires a hard restart.
I have tried three different external monitors, all giving the same result. The MBP is connect to external power, and I am running the latest OS (10.10.3).
Any suggestions before I return this to the Apple store in a rage? :-)

Hello there, Gaflin.
I'm sorry to hear you're having so much trouble getting your external display to work the way you are expecting with your new MacBook Pro. The following Knowledge Base article provides a great checklist of steps for troubleshooting the issue you seem to be describing:
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
Using Closed lid, Extended Desktop, or Mirroring display modes
When using multiple displays, information can be presented in a number of ways. For more information and what modes are supported by your Apple product refer to:
Apple Portables: How to use your computer in closed lid (display closed) mode with an external display
How to use multiple displays with your Mac
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

How to stop sleep/hibernation with external display & lid down

What is the proper way to get my MBA to not sleep, hibernate, etc. when I have an external display attached and lid closed while watching a movie or webcast. In such a case I am not touching the mouse, trackpad, or keyboard.
I have bluetooth keyboard and usb wireless mouse attached.
I also disabled the sleep/poweroff options in the energy settings while watching.
The MBA still would go to sleep or something after 10 or 15 minutes of no agitation.
Also, the Monitor goes blank since their is not signal coming through to it.
Was this just not a use case that was thought through: Watch video stream with external monitor and lid closed? Make sure the MBA knows this scenario invalidates the powersave options????? And yes, the power was plugged.
Thanks

Caffeine puts a little coffee cup icon at the top bar. Click to turn it off and on - it is on when the cup is dark, ie has coffee in it. However, this won't solve your problem - the MBA will still sleep with the lid closed. There are settings to allow use of an external monitor but what I did was download InsomniaX. This little free app keeps your computer from going to sleep when you close the lid. That way you can close the lid, walk down a hall or do something, then open the lid and keep working. Just don't forget it is on and leave the Mac too long or it will run out of battery.
Insomnia isn't in the App store, had to download it at http://www.macupdate.com/app/mac/22211/insomniax

Sleep mode with external monitor

I've noticed that if I'm using my Macbook connected to an external monitor then sleep mode cannot be initiated by simply closing the lid.
The system starts to enter sleep then bounces out of that mode and remains running (with the dock having moved to the external screen)
Initiating sleep thru' the on/off button seems to work.
Isn't this what Beta versions are for?

Hi Ruby326,
Welcome to the Apple Support Communities!
This does sound like a very frustrating situation. I understand that your keyboard and trackpad not responsive after waking from sleep and you are forced to shut down to get them to respond. In this situation I would recommend resetting the computer’s PRAM and testing fresh. Please read over and follow the instructions for this process in the attached article.
OS X Yosemite: Reset your computer’s PRAM
Have a great day,
Joe

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Congratulations on taking one more step in becoming more self sufficient in tech stuff.
But I have to wonder why you spent so much on a Retina display only to have it cooking uselessly there.

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Hello @LogicMantra,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your desktop is not able to display after booting in safe mode, and I would be happy to assist you in this matter!
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I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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Hello,
When I connect an external monitor to my MBA, I lose my connection to the Internet. The wi-fi signal remains strong, but pages will not load (I tried many) and I cannot retrieve email. The connection times out when I try to ping as well. This occurs whether I have the MBA open or closed. The loss of Internet happens immediately when I connect an external display using the supplied dongle, and returns the moment I disconnect it. It is clearly an issue with external displays.
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Just a quick update... I was on the phone with Apple Support on Saturday morning and I thought we were making progress. The basic idea behind the proposed solution was that there was some "Preferences" that were causing the problem. We started over with a clean Preferences folder and tried connecting up the external monitor. At first, this approach was showing progress. The suggestion was to copy over my original Preferences (I had made a backup copy) just a few at a time until we figured out which ones caused the problem. The problem with this approach is that immediately after I got off the phone, the internet started not to work again. So, even with a clean Preferences folder, the internet would quit working after connecting up the external monitor.
So, I'm back to the drawing board. I have since restored my Preferences folder and I don't have my external monitor and internet working at the same time. BTW, I also upgraded to 10.5.3 and it didn't help.
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http://accessories.us.dell.com/sna/productdetail.aspx?sku=223-4890&cs=19&c=us&l= en&dgc=SS&cid=27530&lid=627063
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Solved!
Go to Solution.

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I'm still at a loss with the calibrating instructions?
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aarons84 wrote:
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Trouble getting out sleep mode with external display

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