[0xWTF]

The weird edge cases that live around connectors never cease to amaze. I recall one, I think it was also HDMI (maybe displayport or VGA), that showed there's a very low resolution digital graphic or text signal and some connectors even have a screen embedded in them.

[nyanpasu64]

IIRC HDMI/VGA is I2C and can drive an I2C display, but it's normally only used for EDID display identification and DDC brightness control.