HP EliteBook 860 G11 type-c not sending video to external monitor

[Blakec123]

So I have to make an edit and let everyone know that my 79$ IFI iSilencer Max noise cleaner and / or ferrite beads did NOT work.  Same identical behavior.  A 5' cable works with my G6 Elitebook 860.  The 3' very expensive cable + noise cleaner does not work when the external power brick is connected to my KVM (which is a passthrough to charge my G11 with a single USB C cable).  However Video works with the brick connected to the second USB C port (a poor workaround as I have to plug in two USB C cables instead of 1). 

I work for Texas Instruments as an applications engineer for the Digital product groups and we are a big supplier of USB type C PD chips in our Analog group.  My analog engineer in my office who covers the PD product line and has extensive experience with engineers designing with our parts is pretty sure that the USB PD stack is being misinterpreted by the Laptop.  So we are back to one of two fixes:

1) BIOS upgrade (solvable - but we have to wait on HP)

2) Hardware upgrade (terminal problem with no viable fix)  

Fingers crossed that HP rolls out a fix to the BIOS or at least lets us know that it is a hardware problem (I would be pleasantly surprised if they owned up to this problem).

Note the KVM support over at AV asked me to try a short USB power cable so I bought a 6" cable, tried my ferrite beads and iSilencer active noise canceller.  Same behavior - no video when USB C power connected to the KVM, returns when the power is removed.  Another clue is a high speed USB C SSD also follows this behavior, while low speed mouse and keyboard work with or without the USB C power cable hooked up (proving the KVM does work in some fashion).  Note that the PC does charge with the USB C power brick connected to the KVM - just no Video or High speed external SSD.

Blake