External display issue when Macbook wakes up

Hi there,
I have an external display (Samsung 920nw) used as an extension of my desktop. When I go to sleep so does my Macbook... I close the lid and the computer goes to sleep mode within seconds (the white led on the front right slowly flashes confirming that the computer got to sleep).
The problem starts in the morning when I wake up the Macbook. The white led is still and not flashing anymore and when I lift the lid only the external display works with a poor resolution. The macbook display remains off. To solve the problem I need to detect displays and rearrange everything again between the screens.
I am not sure but I believe that sometime during the night the Macbook wakes up and he thinks that I am using the external display as the only display.
I want to lift the lid and both displays to be working as they were before going to sleep mode. Is anyone facing the same problem and/or have any clue of what is happening?
I have a bluetooth mouse and a usb hub with printer, pen drive, external hard drive attached to the macbook.
Thanks for helping.

Could be caused by a backup drive or some other application running in the background. There's no way to be sure without looking at your crash logs. I keep my computer on but I always close down my apps at night to protect them from power outages.
Nancy O.

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After waking my external display from sleep (the entire Macbook was not asleep, just the external display), the garbled colored dots kept appearing at the top and bottom of the screen, only then for the entire display to go black, then about 5-10 seconds later the images comes back, but with the garbled colored dots at the bottom. It will keep doing this over and over again.
It's only happened once so far, but I seem to remember reading about some issues when waking from sleep with the new unibody Macbooks with regards to external displays. Is this a known issue with these Macbooks?

There have been similar reports. However, not all external displays in combination with a MacBook will exhibit this problem. Thus, it seems either display specific or something that is caused by a cross between one display and a MacBook.
I assume that you are using one of Appe's mini DisplayPort to DVI adapters to connect to the external display. In that case have you installed the latest firmware update for the adapter?

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I have posted this annoying Robles to bugreport.apple.com. Hope I can get locution (although Apple normally will not respond):
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The external display issues remain, even after installing the update.
I'm sick of this!
Is it a hardware issue or software related?
Are the 9600 graphics chips defective?
Come on Apple and be honest to your customers, we all paid a lot of money for these systems!
Does anyone out there know where can I complain to?
I need an email address or something that is not directed at iphones or ipods!
Cheers.
<Edited by Moderator>

I'm not sure what to make of this at this point. I ordered a CTO 2.8GHz with 4GB RAM and 320GB HD the day they were announced. First week or so, few if any problems. Then the "UHF" like bands of static began to appear randomly. I use my computer 90% of the time driving an external monitor. I use a separate set up at home and work with duplicates of all cables. The problem occurs on both. I spoke with Apple Care - they patched me over to support and moved me up to Tier one pretty quick, even had me send in my System Profiler information for every combination of screen and graphics card. Then they emailed me a program to capture my monitor info again with every combination of screen and graphics card. No solution. They finally asked to "capture" my computer for their labs and sent me a new one.
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I've been using Apple Products for a long time. I've seen some real buggy stuff - like when File Vault first came out but this is the worst I've experienced. Seems like poor quality control. If it's a select few machines, I appear to have won the lottery as I've had two of them.
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Hi all, new mid-2012 macbook pro non-retina user, I have an PC external display with Microsoft USB wired keyboard and mouse pair (the keyboard and mouse are wireless but connected via a USB desktop receiver) but even when all connected up, shutting the mac lid always turns off external display too and no amount of pressing keys or mouse clicking wakes up the display again. External display only wakes up when I open the lid again. There's also a clicking noise from the mac every time I close the lid with external display connected. Any ideas? I've tried a number of things, wondering possibly if my cheapo (non-Apple) VGA external display to Minidisplayport adaptor is the culprit? Also, everytime I connect the display I have to go to display settings to get it to recognise the external display. I haven't installed any software for the USB mouse and keyboard , the macbook recognises it ok.

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External display issue when Macbook wakes up

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