Hi,
I am running FreeNAS-11.1-U6.3
Since EPT and UG features are shown, CPU is fine.
[root@freenas ~]# grep VT-x /var/run/dmesg.boot
VT-x: (disabled in BIOS) PAT,HLT,MTF,PAUSE,EPT,UG,VPID
About start on boot box, I am not sure where this is. If you mean "Autostart" check box in VM settings, then yes it is checked.
When I press start I even get green message on top of the screen "VM Started“
Is there any log files available?