I have a ODROID XU4 single board computer, running Ubuntu server 16.04LTS. On the last days, a strange problem appeared. When I shutdown or reboot the system (within root) the system hangs. When I shutdown using "shutdown -P", the system shutdown does not complete. When I reboot using "shutdown -r" or "reboot", the system does not reboot.
And when I issue the shutdown command, I can not SSH to it any more (connection refused). I connected a monitor,and after issuing the shutdown command, I get a blank screen with only the cursor flashing, and stays that way for ever... Below is the contents of /var/log/syslog, I don't know anywhere else to look for clues of what's causing the problem...
root@odroid-server:/home/bomberb17# cat /var/log/syslog | grep "Jul 3 14:15"
Jul 3 14:14:52 odroid-server rsyslogd-2007: action 'action 9' suspended, next retry is Sun Jul 3 14:15:52 2016 [v8.16.0 try http://www.rsyslog.com/e/2007 ]
Jul 3 14:15:01 odroid-server zma_m2[1557]: INF [Saloni: 485 - Gone back into alarm state]
Jul 3 14:15:03 odroid-server zma_m2[1557]: INF [Saloni: 488 - Gone into alert state]
Jul 3 14:15:10 odroid-server zma_m3[1310]: INF [Eisodos: 2755 - Gone into prealarm state]
Jul 3 14:15:34 odroid-server systemd[1]: Stopping Session c1 of user root.
Jul 3 14:15:34 odroid-server systemd[1]: Stopping ACPI event daemon...
Jul 3 14:15:34 odroid-server systemd[1]: Stopped Stop ureadahead data collection 45s after completed startup.
Jul 3 14:15:34 odroid-server systemd[1]: Stopping User Manager for UID 0...
Jul 3 14:15:34 odroid-server systemd[1]: Starting Unattended Upgrades Shutdown...
Jul 3 14:15:34 odroid-server systemd[1]: Stopped target Graphical Interface.
Jul 3 14:15:34 odroid-server systemd[1]: Stopped target Multi-User System.
Jul 3 14:15:34 odroid-server systemd[1]: Stopping OpenBSD Secure Shell server...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping LSB: automatic crash report generation...
Jul 3 14:15:34 odroid-server systemd[1]: Stopped target Login Prompts.
Jul 3 14:15:34 odroid-server systemd[1]: Stopping Serial Getty on ttySAC2...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping LXD - container startup/shutdown...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping LSB: Set the CPU Frequency Scaling governor to "ondemand"...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping Deferred execution scheduler...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping LSB: start Samba SMB/CIFS daemon (smbd)...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping Snappy daemon...
Jul 3 14:15:34 odroid-server /usr/lib/snapd/snapd[639]: main.go:64: Exiting on terminated signal.
Jul 3 14:15:34 odroid-server snapd[639]: 2016/07/03 14:15:34.592247 main.go:64: Exiting on terminated signal.
Jul 3 14:15:34 odroid-server systemd[1]: Stopping Regular background program processing daemon...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping FUSE filesystem for LXC...
Jul 3 14:15:34 odroid-server systemd[1]: Stopping LSB: start Samba daemons for the AD DC...
Jul 3 14:15:34 odroid-server rsyslogd: [origin software="rsyslogd" swVersion="8.16.0" x-pid="653" x-info="http://www.rsyslog.com"] exiting on signal 15.