Video lockup on 27" iMac

Okay this has been happening sporadically since I got my 27" back in December. It was happening maybe once every few weeks but now it's done it four times today and it's driving me crazy. The video locks up but everything else seems to keep running okay. The screen is covered with little flickery blocks. The cursor is still there and moves but is also messed up. Audio continues to play, Time Machine continues running, etc. Usually I can save and quit whatever I'm working on blind and it's fine after restart.
Has anyone ever seen this?
http://img7.imageshack.us/img7/7127/1225091231a.jpg
http://img404.imageshack.us/img404/8206/1229091137b.jpg
I've had some trouble with flickering too and there does seem to be a slight yellow tint toward the bottom of the screen. The last display driver update seems to have reduced the flicker to almost nothing.

Welcome to the Apple Discussions!
The new iMac requires that the video output of the other device is in the DisplayPort format. Currently there are converters to do this and then you connect the converter to the iMac with a m-DP to m-DP cable. However, these converters are about US$150 and the resolutions that they provide are not always ideal, requiring another device to control the resolution. Atlona and Kanex have made such converters.
Dah•veed

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Using the web server on the iMac there is a easy way
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<begin quote>
<html version="2.0">
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The Doctor-Who.html file contains:
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<a href="TV Shows/Doctor Who/Season 4/2-03 The Fires of Pompeii.m4v">2-03 The Fires of Pompeii.m4v</a>
 
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I am working on coming up with a way to play an entire musical album and playlist.
Right now it is single songs only which tends to limit its usefulness.
For videos it does work extremely well. Even though I have a 64GB iPad, a 64GB iPod touch, a 32GB iPod touch, a 32GB iPod touch( 1st generation), and an 16GB iPod nano I do not have to sync a video to them in order to be able to view the video.
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I hope that helps you to enjoy your iPods, iPhones, and iPads.
terry ><>

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