I've been trying to use Stretch on my raspberry pi 3 for a few weeks already, and it seems that I have some trouble for starting the Pi. I installed Stretch on a 32 Gb SD card, but I also tried with some 8Gb and the result is the same.
The first boot is always great, I have the image on my screen (HDMI to VGA plug). If I use the command
reboot, it will reboot perfectly. If I turn it down with the command line
shutdown or with the shutdown menu, it won't boot with the image. I can reach the raspberry on SSH, and then reboot it, and the monitor will be on.
I have used Etcher to flash the SD card, and I've tried to download again the image.
Thanks for your help! =)
PS: I know there is already a similar question (Screen won't boot on second startup) BUT there is no answer, not even a hint.
PS2: I have a 2A plug, and it have never been like this with Jessie.