I have an ASUS P5E-VM HDMI motherboard which has GMA X3500 graphics onboard, running Fedora 16, this is used as my mythTV frontend. Previously the PC was connected directly to a Toshiba Regza 40ZF355DB (which is an HDMI 1.3 device) and all was well including colour gamut (RGB output with full 0..255 range) I had calibrated the colours using the BBC HD Testcard W which uses superblack (i.e < 16) and superwhite (ie. > 235) it was possible during calibration to see the difference between black and superblack, and between white and superwhite. My setup now includes a Marantz NR1602 amp (which is an HDMI 1.4 device) this is connected between the PC and the TV, but has slightly upset the apple cart :-( Initially I noticed that the colours were different, blacks have become grays, saturation seems higher, checked using the same testcard. Previously I hadn't had to fiddle with xvYCC settings on the TV, I have now tried this setting as on/off/auto and though it seems to change the saturation,I still can't see the super black/white during calibration, it seems the amp is "clipping" the RGB levels to the 16..235 studio range, which I gather is common behaviour for AV amps OK, enough scene-setting, here are the xorg questions ... Is there any xorg.conf setting to switch the HDMI output to YCbCr mode instead of RGB mode? Similarly is there any setting to indicate an xvYCC gamut, which might persuade the amp not to clip the colours? And finally, is there any support for DeepColour (30bpp or 36bpp)? Searching around it seems I might need a newer chipset than X3500 for some of the above, especially the DeepColour mode, I might treat the PC to an ASUS P8H67-I motherboard and a sandybridge CPU if it would help, any difference between HD2000/HD3000 as far as these options are concerned? Any suggestions for HDMI connection via the amp would be welcome too ...
