I flash on the emmc the ubuntu, connect the wifi, update/upgrade package, copy the ssh key.
After that i can ssh the machine, no problem. But after few hours i cannot ssh anymore.
i check by plugin a monitor and see that the vim is still runing ok.
If i reboot the vim, then i can ssh again but after this delay (2-6h i dont really know), the ssh became impossible again.
Any idea or suggestion of a log that i can check to see what is going on?