Solaris 11 poweroff doesn't work on Dell 755
I've just installed Solaris 11 on a Dell 755 SFF PC (Intel Q6600 CPU, 4 GB memory).
My issue is that when I shutdown ("shutdown -y -i5 -g0") or when I issue the "poweroff" command, the system doesn't power off once shutdown is complete.
I have a number of these machines running Windows & Linux, so I'm pretty sure it's a Solaris thing.
I'm hoping that somebody might be able to advise on this.