Is there a windows command to determine which version of HDMI specification is available/implemented on a given video adapter or other HDMI information?
Software utilities are also welcome.
Similar question for Ubuntu went unanswered here
What you're trying to accomplish can either be enumerated from the driver files if they're accomodating or from the Registry, but the registry stores it in unfriendly bytes instead of strings.
I used to work in an independent computer store reselling used equipment and we'd use Monitor Asset Manager from Entech to enumerate video cards and monitor EDID info and it would also display HDMI info. Edid Manager from Extron is another useful GUI utility that would give us more info than any human could possibly want from their video card even from the restricted Properties key in the display devices registry settings that normally require system access to obtain. Both are shareware and free respectively.
Dumpedid from Nirsoft.net is a good and free command line utility and can also enumerate remote systems and dump into a text result file.
I personally despise WMI since it always seems to give me too much of the useless info and fails to deliver the right info. If Microsoft could deliver a basic dmesg funcitonality, it would make many people happy.
BUT, for those who are still fascinated by WMI, I've always found Microsofts unsupported WMI code creator (freely downloadable, just google for it) to give more shortcuts on more useless data than you could use.