Connection problems and questions

Last night I was working on my BBB, using SSH with putty and VNC. I had to reboot to test a script and when it came back both vnv and putty failed to connect. I cycled power several times but each time there was no connection except it showed up as a usb device in windows explorer. Since it was late I shut everything down ans started back this morning. When I powered up everything worked. Why does this happen? I also wonder about the choice of connman, this seems way to complicated for such a small board. Also I would like to change the screen size in x11vnc, but can not figure out how.


There is something broken.
If i do:

   systemctl restart dropbear

from the console, ssh will work again.

Some people thinks that the key is corrupted "/etc/dropbear/<xxxx>" IIRC.