[Bug 1291321] Re: migration fails between 12.04 Precise and 14.04 Trusty

[Doug Smythies]

My comment may not apply to this, but I'll make it anyhow:

I upgraded my host server from ubuntu 12.04 to 14.04. Afterwards, none
of my desktop VM's worked (I haven't even tried the server VM's yet). I
made a new guest VM using the exact same "virst-install" command I had
used for the original VM creation on the 12.04 host server, and compared
the resulting .xml file. There were 3 or 4 differences, but this one:

<type arch='x86_64' machine='pc-1.0'>hvm</type>

in 14.04 became this:

<type arch='x86_64' machine='pc-i440fx-1.7'>hvm</type>

I used "virsh edit" and changed that line and the guest VM originally
created under a 12.04 server host then worked under the 14.04 server
host.

Note: So far, this change has been made to 6 VM's (5 are either 14.04
originally or as upgraded from 13.10, and one was a 12.04 Desktop guest
VM) and 5 of them are now working. The one is only not working for one
log in type out of 5 possible (GNOME; GNOME Classic; GNOME Flashback
(Compiz); GNOME Flashback (Metacity); Ubuntu (Default)).

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https://bugs.launchpad.net/bugs/1291321

Title:
  migration fails between 12.04 Precise and 14.04 Trusty

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