I'm running a Raspberry Pi 3+ running Raspbian Stretch (Desktop) and sometimes it hangs on reboot for about 3-5 minutes. If I boot and then reboot immediately, it won't hang. Seems like it hangs after running for awhile. I mostly watch videos in Chromium hooked to a TV with my Pi. I have a bluetooth usb dongle plugged in since the on board doesn't work. I don't have a problem with the usb BT dongle. It always hangs at this stage when it hangs
stopped lsb autogenerate and use a swap file
Not sure where and which file to look in the log files to see if it gives me a hint as to what the issue is.