My device, too, stopped working as a display-provider - building and downgrading to 4.1.9 (wasn't in my cache, was scared for a moment ;-) ) worked as well.
Device: 17e9:4307 DisplayLink USB3.0 Dual Video Dock
Edit: w/r to debugging: I wouldn't know where to start, dmesg/journal are inconclusive either ("evdi: starting logging at level 5" is the only message)
Edit 2: nonsense removed
Pinned Comments