Screen sharing: Black application window capture

[xenithorb]

OS: Fedora 26
Chrome: Version 61.0.3163.100 (Official Build) (64-bit)
Jidesha: Jitsi Meetings - 0.2.6.12
Graphics: NVIDIA proprietary - 384.90

Problem: Almost all application windows display as black when attempting to screen share. Some show partial content, but never all. The mouse is always captured when hovering over the window that is meant to be captured (so video is working, etc)

I believe this to be a regression in either the browser's abilities, Jidesha itself, or the nvidia driver I'm using. I am 100% certain that I've used this in the past few months when it worked completely fine, I just can't give an exact timeframe.

I'll attempt to do some more troubleshooting and leave what information I find here.

[bgrozev]

The only thing jidesha does is allow the browser's API to be called by code executing in a web page. I don't see how it could influence the contents of this UI, so the problem is most likely somewhere else.