Latest attempt on M501d-A2R settings. (Sony BDP-S5100 outputting RGB and Spears & Munsil 2. Results using the YCbCr options yielded inferior performance to RGB on the Spears & Munsil Colorspace Evaluation pattern.) I forgot to capture the full version number on the Vizio, but it is the 1.34 version. I did a factory reset just prior to this. Even after the factory reset, the picture still comes up with odd coloring such as green/purple flesh tone hues and reduced color intensity until the top banner disappears after the TV is first turned on.
Grayscale was left at defaults, as CNET's calibration report for the M551d-A2R
shows good RGB balance and grayscale results pre-calibration, with the pre-calibration actually being better at 100IRE, and more uniform across the scale than the post-calibration, although with a very slightly higher overall dE. Based on their report, the variances between pre and post calibration appear to be so small as to be imperceptible. Whether the post firmware update default grayscale is the same as the pre firmware update default grayscale is debatable (as I don't have equipment to accurately measure it). Hopefully there was no change made.
The CMS options are still confusing to me. This time I tried to correct the color setting patterns using only the color brightness controls, rather than using the hue controls for the secondary colors. I'm uncertain if this is correct, although the results appear correct based upon the color test patterns for red green and blue. If the Vizio is a wide gamut display, meaning that it uses primary colors that are saturated beyond rec. 709 specs and then uses the CMS to compensate, my methodology for setting the color and hue controls, as well as the CMS controls may be incorrect. However this would also likely make the blue only (as well as the red and green only) options pointless, as none of display's primary colors would ever be displayed alone when reproducing a rec. 709 (HDTV) image. Mixing of the primary colors would always be necessary in order to desaturate the primary colors to rec. 709 specs.
Does anyone know for sure if the Vizio M series used rec. 709 primaries, or if it is a wide-gamut display?
In any case, I'm quite satisfied with the image and color quality for Blu-ray discs. I copied these settings for the internal ATSC receiver, and the results while watching OTA TV seem more questionable. This may be an indication that the Sony BDP-S5100 chroma output is above standard (which I experienced with a BDP-S1).