------- Comment From [email protected] 2018-03-28 06:24 EDT-------
Note from Daniel, who is looking into this bug.

-----

Quick recap: this problem happens because we don't have the wake-up from
software suspend implemented in the pseries machine. In fact, at least
last time I checked, only the x86 machines implement it.

I've send patches to the QEMU ML about 3 months ago to implement a new
API (well, technically a change in an existing API) to detect whether
the guest has this capability or not. The idea is to use it in Libvirt
to prevent pm-suspend and similar commands to execute at all if the
guest can't proper wake up. The patches were left behind along the way,
and now people are working towards the RC releases of 2.12 (i.e just
critical bug fixes).

I'll re-re-send that patches aiming for 2.13 and see if we can finally
get them upstream.

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https://bugs.launchpad.net/bugs/1759509

Title:
  Ubuntu18.04 - [qemu] virsh dompmwakeup fails to wake VM from
  dompmsuspend state (kvm)

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