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Old 05-02-07, 08:30 AM   #25
krionius
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Default Re: Linux + HDCP

it was just desktop.
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Old 05-02-07, 01:33 PM   #26
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Default Re: Linux + HDCP

Quote:
Originally Posted by krionius
(to clear up the TV asks for lower resolution and it receives such, so you cant set your output to such big resolution)
I am not convinced. Many TVs are broken by design. The EDID data presented on the VGA/DVI input usually does not accurately represent what the TV actually can display.

First try it with the options to ignore the EDID and just send HDTV timed video to it. When it does not want to display that, maybe you have something. But my TV just displays HD in that case.
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Old 06-12-07, 07:08 AM   #27
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Default Re: Linux + HDCP

OK now I am a bit more literate on HDCP then when I started the thread. But the more I read the more questions I have. Asking it again differently,

what is (if any) the technical hurdle in providing an option in the Linux Nvidia driver that enables HDCP on the output?
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Old 06-12-07, 09:09 AM   #28
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Default Re: Linux + HDCP

Yes, it would be nice to know. Maybe the mentioned "security" "obfuscation" is the reason?
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Old 06-12-07, 10:25 AM   #29
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Default Re: Linux + HDCP

As mentioned previously, HDCP shouldn't be an issue for you. The way it is supposed to work is that the TV should accept any valid signal and display it, HDCP or not. Consumer electronics like HD-DVD players are supposed to downgrade the signal if they can't send it with HDCP--it's all on the sending side. (There are rumors of TVs that will downscale without HDCP, but none have been confirmed as far as I know. Most have been proven to be user confusion based on downscaling policies at the video source.)

I would start by sending a standard ATSC 720p signal, even if the native resolution is 1080i. Your TV should automatically scale it.

Then try to get 1080i working. Unfortunately, the nVidia drivers have lots of problems with interlaced modes. If you get a valid 1080i mode from the TV's EDID information, it should work with the 8776 drivers, but it will display as 1920x540 with newer drivers (even though it tells X that it's 1920x1080). Getting the right options and modeline to display 1080i with 9xxx and 100.* drivers is a black art. [There's a thread on "1080i" discussing these problems.]
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Old 06-12-07, 01:55 PM   #30
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Default Re: Linux + HDCP

Quote:
Originally Posted by pranay
what is (if any) the technical hurdle in providing an option in the Linux Nvidia driver that enables HDCP on the output?
Money. Lots of it. That's the only way you will get HDCP support in nvidia's driver - by buying developer time. Or to say it in another way: by paying nvidia lots of money to implement it for you.
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Old 06-12-07, 02:13 PM   #31
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I think the issue is not that it is so difficult to develop, but that the hardware vendors have signed agreements that they will not develop it for open systems.
So the money is not required to buy developer time, but to bribe the developer.
And of course once it surfaces, he will not be a developer anymore and the hardware manufacturer may lose his license.
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Old 06-13-07, 04:35 AM   #32
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Default Re: Linux + HDCP

Quote:
Originally Posted by pe1chl
I think the issue is not that it is so difficult to develop, but that the hardware vendors have signed agreements that they will not develop it for open systems.
So the money is not required to buy developer time, but to bribe the developer.
And of course once it surfaces, he will not be a developer anymore and the hardware manufacturer may lose his license.
I dont understand why? NVIDIA drivers are closed source are they not.. This would apply if we asked NVIDIA to release specs for the open source driver... but with their binary driver how does an open system aspect apply...
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Old 06-13-07, 06:20 AM   #33
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Default Re: Linux + HDCP

Quote:
Originally Posted by pe1chl
I think the issue is not that it is so difficult to develop, but that the hardware vendors have signed agreements that they will not develop it for open systems.
Do you know this for a fact? Can you provide some links? Wouldn't surprise me if it's actually true, I would just like some confirmation.
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Old 06-13-07, 01:07 PM   #34
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Default Re: Linux + HDCP

Quote:
Originally Posted by Gusar
Do you know this for a fact? Can you provide some links? Wouldn't surprise me if it's actually true, I would just like some confirmation.
The whole "content protection" scheme that HDCP is a part of is based on "trust" of the entire path between the producer and the eyes of the viewer. It can only prevent copying of content when there is no component in the entire chain that allows you to make a tap of the plaintext information.
That is why drivers have to be validated and signed, so you cannot just install a video driver that copies everything to a diskfile instead of sending it to the display.

In an open system where everyone can modify applications and drivers, there is no such trust (in the eyes of the producers) and thus it will never be allowed, IMHO, license HDCP and other content protection on them, or to use licenses obtained by hardware manufacturers (for the purpose of implementing drivers for trusted, closed, systems) to implement HDCP and related things for Linux.

The manufacturers are well aware, and they are reminded all the time, of the fact that content protection in an environment where there is no direct communication between the consumer's equipment and systems maintained by the producer will always be based on "security by obscurity" and "trust of the entire chain". This inevitably means total control.
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Old 06-13-07, 08:33 PM   #35
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Default Re: Linux + HDCP

Quote:
Originally Posted by pe1chl
That is why drivers have to be validated and signed, so you cannot just install a video driver that copies everything to a diskfile instead of sending it to the display.

Comming back to my question, dont the binary NVIDIA drivers satisfy this requirement.
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Old 06-14-07, 12:01 AM   #36
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Default Re: Linux + HDCP

Quote:
Originally Posted by pranay
Comming back to my question, dont the binary NVIDIA drivers satisfy this requirement.
It's informative that none of the Mods have chimed in. I would avoid this too.
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