Oh, and when I said earlier "i don't believe my card is scaling it", I wasn't wrong. Contrary to what you have indicated, it's perfectly possible to have the card scale the OS supplied image...
That wasn't what I was getting at. I mean, why would you set the video card to one resolution, only to have it scale it to something else? Thats silly. With LCD monitors, you have a fixed set of pixels, so ideally you set the video card to that resolution, and then your done with it. I have no idea why you would have the video card do any scaling like that.
So, upon basis of this, I maintain that your friend is NOT watching HDCP content on this display running any resolution over 1280x800.
Next time I talk to him, I'll have him get a picture. It is happening, I can guarantee that. This is because his video card IS FULLY DUAL LINK HDCP compliant. So, even when he has the monitor at 2560x1600, it can keep the HDCP link intact. His card can, yours can't. And as I've said quite a few times, it isn't the monitor you should have issue with here.
But, just to prove to you what I'm talking about, here is a page from over at HardOCP discussing THIS VERY ISSUE. Read that, and get back to me on what you think...
http://www.hardforum.com/showthread.php?t=1071342
As you can see, your card is on that list. But it only has Single Link HDCP compliance. And, the 2900XT that my friend has is also on that list. But, it has full Dual Link HDCP compliance. Thus, your problem. Backing down to 1280x800 is apparently ok, since it is well under the 1920x1080 resolution that HDCP is intended to protect.
It's also a flaw not mentioned anywhere on Dell's page, I can't imagine they'd want to advertise that their premier (at the time) display is incapable of modern resolutions for HDCP. I should not have to search around the net to find these limitations out, they should be listed on the product page, hence my gripe.
Again, it ISN'T a flaw. This monitor DOES have full DUAL LINK HDCP compliance. In this instance, it is YOUR video card that has the "
flaw" here causing issue. Your card can only do HDCP over a Single Link connection. And since that is all it will do, on this monitor with its Dual Link HDCP connection, you get 1280x800 as a max HDCP compliant resolution. I was just guessing that it would pass the test at 1920x1200, which it did not, so oh well.
This all raises an interesting question. If the Dell is incapable of 1920x1200 on a single link, but displays the resolution on a Dual Link connection, then is it not out of specification for DVI? Again, it is worth mentioning that none of this is on Dell's product page.
You said yourself earlier that you can run the monitor at 1920x1200 just fine. It can do that resolution fine. But that isn't really the issue here. If you want to run it at 1920x1200, or higher, all while HAVING HDCP compliance, your video card WILL NOT do it. Yes, it is a quirky issue, the whole Single/Dual HDCP compliant thing. But, it is confirmed that the 3007 has FULL DUAL LINK HDCP compliance. So, there is nothing wrong with it.
Again, I'm just going to take a guess at this, since I have no way to test it. But, if you were to use your video card with a Dell 2407, run it at 1920x1200, and do that test again, you would probably pass. That monitor has a regular Single Link connection, and is HDCP compliant. And, your card CAN do HDCP over single link. So, even at full 1920x1200 resolution, you have the protected HDCP link intact. Thus, it would pass your test.
So really, it isn't really a "
flaw" with any of the items you have. The 7950 has a Dual Link output, so it will display all the way up to 2560x1600. But, it only has Single Link HDCP compliance. So, it WILL NOT be able to playback protected content, or pass your test, at any resolution higher than 1280x800.
The 3007 has a Dual Link HDCP connection. In order to have content played back with the monitor at full 2560x1600 resolution, you also need a video card that is capable of Dual Link HDCP compliance. As I said, my friend's 2900XT has that capability. Your 7950 does not. Thus, he will pass that test at full resolution, you fail it as we've seen.