Update 2018.5.377 ec8b took 12 hours to complete and road service to wake up Model X ! It completely shutdown, tech folks could not wake it. Road service opened trap door in grill ,pull two strings, popped open Frunk, popped of battery cover and put jump start cables on it, it woke instantly. Had to reboot touch screen. Got new Navigation updates and new warning for hands on wheel while on AP.
BOTTOM - make sure u have strong internet signal when doing software update. Service said seen this before. My EV was 99% downloaded when system went to sleep. This happened in the parking garage of a high rise. All cement!
Huh. We've always been told that you don't get notified until the car does a complete download and verifies the package, so I would have thought that cell signal during the update itself was irrelevant.
I'm not sure what to make of this.