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mcuee / libusbk

libusbk official github repo
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Bluescreen with loose HDMI connection #42

Closed FrostKiwi closed 1 year ago

FrostKiwi commented 1 year ago

A loose HDMI connector under vibration causes an Elgato CamLink to restart due to momentary loss of HDMI signal. When this happens during streaming via libUVC + libusbK from said connection, Windows Bluescreens and reboots. 100% repeatable.

https://user-images.githubusercontent.com/60887273/204079682-6c978ec1-d10b-4b24-a84c-e1c68f8483bd.mp4

Giving attribution is hard, but I suspect libusbK being involved, so I post it here. My exact setup surrounding this bug is posted in detail here https://github.com/libuvc/libuvc/issues/245. Windows 11, Version 21H2 build 22000.1219

I have no idea how to debug on the system level with Windows. The only kernel level debugging I have ever done is with BSDs, so I don't even know where to begin. AFAIK libusbK is the first library with system level access in the chain of streaming video via libUVC. Thus I posted it here to gain some more insight. Of course, libusbK may not even be the culprit after all.

image

mcuee commented 1 year ago

Pretty sure this is not a libusbk problem but libusb problem. And there is no solution as of now since libusb still does not support hotplug under Windows.

mcuee commented 1 year ago

You can post the issue in libusb github along libusb debug. I will close the issue here.

BTW, I am also an admin of libusb project.