[libvirt] Cannot find suitable emulator for x86_64

[Mathieu Tarral]

>> >
>> > What version of QEMU do you have installed ?  Libvirt has recently
>> > become more aggressive at requiring modern QEMU versions, so its
>> > possible if your old libvirt was running against old QEMU, that
>> > might not be supported with new libvirt.
>>
>> I'm using QEMU 2.8 here.
>> That might explain why libvirt cannot find a version that is modern enough.
>
> 2.8 is plenty new enough, so that's not the issue.

Alright, so let's focus on libvirt 4.4.0.

When I start the daemon, i can see some warnings related to QEMU:

warning : virQEMUCapsInit:942 : Failed to get host CPU cache info
warning : virQEMUCapsInit:949 : Failed to get host power management capabilities

Could this be the reason, or the beginning of an explanation ?
How can I dig and find what is the root cause ?

-- 
Mathieu Tarral