I have a 15" rMBP i7 with 16GB ram and a 27" Dell U2713hm hooked up via a display port cable (more precisely a display port to mini-display port cable). I am running 10.8.3.
My monitor regularly blinks off and then comes back on within 5 seconds between approx 0-5 times in the first 0-5 minutes that I use the computer.
I have called applecare support. They walked me through resetting a bunch of stuff and it didn't do anything. The best they can tell me is that it "might" be a power supply issue (whatever that means). To pursue it further I would have to bring both the monitor and the laptop into the apple store (which is a big pain because I live in the middle of the city).
What do people think about this issue? Would using a dual link DVI cable fix my problem? Is it a "known" general problem? Or is it "normal"? Or should I take my computer to the apple store? Thanks!