Originally Posted by isucamper
ok, so I know this thread is about the Xbox and HDMI, but I don't have an elite so I did some testing with my PS3
I officially see no difference between using HDMI1 in PC mode as described in this thread from using HDMI2 with Black Level set to "Normal". If there's a difference, it is miniscule enough that I can't see it. In both cases, I have my PS3 set to RGB "Full" mode which I assume is similar to the Xbox's Expanded setting.
One thing that was really weird on my PS3, is when starting a game, or a blu-ray, the TV would kick out of the PC mode, and PC Home Theater would be grayed out. I could access it on the XMB, playing demos, or playing videos off the hard drive, but when the machine was running a disk, it would revert back to normal (non-pc) mode.
Kinda strange I thought.
The PS3 has no problems switching between RGB and 16-235 for Blu-Ray. The Xbox/TV is the problem. My theory is that Samsung and Microsoft worked together on the "game mode" and because of that partnership, the TV recognizes the 360 as a 360 specifically, and it seems that all combos of "HDMI Black Levels" (Low/Normal) and "360 Reference Levels" (Normal/Expanded) end up in a sort of happy medium between video game black levels, NTSC black levels and HD-DVD black levels, but never tailored to a specific colorspace range so it looks "good enough" for Joe Consumer no matter what he is doing with his 360.
I could be wrong, but I know my 360 games and Dashboard now look just as good as PS3 does using RGB over HDMI, no light haze, no shadow detail loss, looks like a computer monitor does (as it should, 0-255)
Hard to explain, but if you're able, and do enable RGB on your 360 correctly, you'll know.