Mackbook Pro 2017 with external monitor crash w...

I detected that from the last update of macOS High Sierra (v 10.13) if you are using an external monitor (

Dell UP3216Q 32”) with a usb-c a AV (HDMI) adapter, and close your mackbookPRO (2017 15" i7) it crash and you need restart it through the turn on/off button.

Even if you have activated the Automatic graphics switching OFF in Settings > Energy Saver.