Just noticed that in openSUSE 12.x, A plain halt will not shutdown the system properly.
On my system, it would leave the screen as shown on the right:
The odd thing: a plain reboot still works properly.
If someone knows a better workaround: please let me know in the comments.
5.4. systemd: System Shutdown
CHECKIT for 12.3. Is this entry still required?
To halt and poweroff the system when using systemd, issue halt -p or shutdown -h now on the command-line or use the shutdown button provided by your desktop environment.
Note: A plain halt will not shutdown the system properly.
Luckily, my openSUSE is a VM, which I can reboot from the ESXi host.
On a physical system, you will end up without any option to resurrect the system.
After installing antivir, a plain halt works sort of: it says it is halted, but ESXi still thinks it is not: