*BUG* HDMI Input randomly goes to black screen or gibberish in flight

[swissfreek]

Goggles connected to Walksnail module via HDMI In (using HDZero HDMI cable). Walksnail is set to 1080P60. Video will work fine on bootup, but randomly on four different flights, it failed mid-flight.

Twice the OLED screens went black. Once the whole OLED went to a weird gibberish that I can only describe as HD static (it wasn't analog static, but that's the closest thing I can say to describe it). The image as a ton of lines with random colors. All three of these instances resulted in crashes.

When I pulled the DVR footage from the Walksnail module (ground unit, not air unit), the files had clear video all the way to impact, when in my goggles I saw black (or "HD static"). So the Walksnail module was receiving video, but somewhere between the VRX module and the goggle screens the link was broken.

There was a fourth instance, where the video went from full screen to just a quarter of the screen, in the upper left, and the colors were all corrupted and artifacts. I could still see video from the aircraft though, and managed to bring it back in for landing.

I assumed initially that these were all problems with the link between the aircraft VTX and the receiver module on the ground, but like I said, the DVR from the unit on the ground shows the link was clear and there was video. So something is happening between the VRX module and the goggles. In all cases I was no farther away than 100m (one time I was almost directly overhead, less than 10m away). It happened without warning, one second I have perfect video, the next second it snapped to either a black screen or gibberish.

I never changed any settings, nothing was overheating that I know of, voltage was good, RC and video link quality were near maximum, etc. Other times I flew far enough away to start losing video link, this issue did not occur. It only happened up close. This also happened with three different air units on three different aircraft. None of the aircraft lost power or RC link before or after the crashes. They were all found still powered up and connected to the radio (though one is most likely damaged beyond repair, sadly).