I don't know if this thread is still being monitored. I have a fleet of 5289's, all are updated to BIOS 1.16.0, and several are still experiencing this issue. When connected to a dock (WD15) the issue goes away. I don't believe it's a hardware issue, as it seems to be intermittent (it went away briefly when I updated to 1.16.0). Hopefully this gets resolved, as we are currently receiving shipments of 7390's, and I truly don't want to have to deal with this on an ongoing basis. This is wasting a lot of time for an issue that Dell has been aware of for over a year.