Am 25.05.2013 12:45, schrieb Stefan Priebe:
Am 25.05.2013 08:17, schrieb Alexandre DERUMIER:
maybe does it work by starting the qemu with "qemu -machine pc-1.X"
works ?

Yes this works FINE! But there is no common pc-1.4 anymore.

You have:
   pc-i440fx-1.4        Standard PC (i440FX + PIIX, 1996)
and
   pc-q35-1.4           Standard PC (Q35 + ICH9, 2009)

It depends which chipset you had used before.

I think we def. need to implement this into proxmox. But what is about
parameter changes for kvm process?

I think the correct way would be:
1.) always pass the -machine parameter so we "know" our default
2.) save the current machine parameter in config
3.) when creating a snapshot save this value too

Same problem occours if we have a running VM (qemu 1.4) and we migrate this one to another server running 1.X. We also need to set the machine parameter here.

Stefan
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