Edit: New description to save time.
I use ASUS's HD4670 with onboard VGA, DVI and HDMI plugs. My display is a SONY KDL-40S3000 HDTV. I use the same HDMI input on the TV for my testing.
When I use DVI with DVI-to-HDMI cable (Catalyst detects the display as DVI) colours are fine.
When I use DVI with DVI-to-HDMI dongle that does not support Audio and HDMI-to-HDMI cable (Catalyst detects the display again as DVI) colours are fine.
When I use DVI with DVI-to-HDMI dongle that supports Audio and same HDMI-to-HDMI cable (Catalyst detects the display as HDMI) colours are washed out and darks are almost black.
When I use the HDMI plug with the same HDMI-to-HDMI cable (Catalyst detecs the display as HDMI) colours are again washed out and darks are almost black.
To sum it up, whenever catalyst detects the display as HDMI the colours are all bad, and it makes no difference if it comes from the HDMI or the DVI plug (+proper dongle) of the card.
I have tried different HDMI cables, different Catalyst drivers, different operating system (Vista 64 and XP SP3), different HDMI ports on my TV, different settings on my TV. Nothing changes.
When the problem occurs and while the display is identified as HDMI I have the option to change the pixel colours from PC to Studio. This changes absolutely nothing.
The colours cannot be fixed by changing gamma/brightness/contrast on Catalyst or TV or combination. Like I said I compare apples to apples by just keeping everything same and change the plug on the card. With DVI everything is fine, with HDMI it's not.
It is apparent that Catalyst sends different colours to the TV when using HDMI and different when using DVI. The problem is that the ones over HDMI are not watchable. I need to get the same colours as from DVI.
I would gladly use DVI-to-HDMI but I lose the audio over HDMI. If I use the dongle that does support audio I get the same problem.
The problem: HDMI outputs dark colours almost black and bright colours amlost white. You can tell the problem even looking at the desktop, folder yellows are washed out, speaker icon on tray almost black.
DVI is way much better, and VGA is ideal.
Hardware: The graphics card is an Asus HD4670 with all three connectors available. The TV is a Sony 40S3000.
Now I can use a DVI->HDMI cable with great results but no sound. When I hook a DVI to HDMI adaptor and a HDMI cable I get sound but same colour output as when I use the HDMI connector in the first place.
I currently have all three connectors hooked up on the TV and it's amazing how different the colours are, especially between HDMI and DVI (both connected on HDMI ports on the TV).
Now I wonder, can this be the HDMI cable I use? Can this be the audio part messing with the colours when I use the HDMI cable?
I wonder because using the DVI port of the card using a DVI to HDMI cable is great, but when I use the dongle plus my HDMI cable results are same as when I use this cable on the HDMI port.
Can this be a cable HDMI version issue? I believe my calbes (I have tried two different ones with same results) are pre 1.2 version. I read that 1.3 and latter also supports xvYCC. Is it possible that a 1.3 cable fix this?
Thank you in advance.
P.S. I have tried various versions of CCC to no avail. I use WinXP MCE SP3 and the computer has nothing loaded but MPC Homecinema and Matroska Splitter.