And just to provide full information, attached please find the serial 
log file when iommu=off is set on the XEN command line via grub.

This obviously (and expectedly) turns off I/O virtualization.

Am 14.08.13 22:24, schrieb Atom2:
> Am 14.08.13 22:18, schrieb Andrew Cooper:
> [...]
>>
>> Ok thanks.
>>
>> Do you mind confirming whether S5 works with "iommu=off" on the Xen
>> command line?
>>
>> ~Andrew
>>
> Yes, that works: The system powers off after issuing
>      shutdown -h now
> from the dom0.
>
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