[beagleboard] Ubuntu 14.04 hangs on the BBB

Hello All, I have installed Ubuntu 14.04 on the BBB eMMc, and it works fine. It has an USB meteo sensor connected. Every few days it becomes unavailable: no ping answers, no ssh access. I need to unplug it, and then it reboots fine, but when I look into /var/log I find very little. How can I

[beagleboard] Ubuntu 14.04 LTS on BBB

hello All, every a few days of diligent work, my BBB loaded with Ubuntu 14.04 LTS vanishes. No SSH access, no ping response. How can I troubleshoot that? The log in /var/log/syslog seems to be incomplete. Many days are missing. There is only an USB meteo sensor connected. thanks for your tim