The PortServer has been rock solid for years, controlling all sorts of different AV gear on its 8 ports. If waited a bit too long, the reply is an error message. Input (HDMIx): querying seems to work fine if the input is HDMI1, but for all other HDMI inputs the query has to be sent within a few moments to get a valid result.
Here is a portion of the Docklight script log I created during testing: response to 'FF') is not working as it should. Thanks you very much, Marty and olivier for your feedback (no pun intended :-) Hmmm, for some reason my TV does seem to cooperate.