[Bug 379991] Re: Certain VMs do not run under KVM using karmic's kernel

[Esa Häkkinen]

T2500 is also older Core Duo (coreduo) processor.

Reproduced from command line: succesfully installed & running winxp sp3
with "kvm -cpu coreduo,-nx".

How do I define "no NX" this in /etc/libvirt/qemu/winxp.xml
configuration file?

<domain>
  <cpu name='coreduo'>
    <feature name='nx' option='disable'/>
  </cpu>

-> won't work, nx feature is not disabled.

neither success with less documented xml file options/features:

  <os>
    <type arch='i686' machine='pc'>hvm</type>
    <feature name='nx' policy='disable'/>
    <feature name='nx' option='disable'/>
    <feature name='nx' mode='set' value='off'/>
    <boot dev='hd'/>
  </os>
  <cpu model='coreduo,-nx'>
    <feature name='nx' policy='disable'/>
    <feature name='nx' option='disable'/>
    <feature name='nx' mode='set' value='off'/>
  </cpu>

** Attachment added: "/proc/cpuinfo on T2500 cpu (coreduo), LG T1 model T1-72JVW"
   http://launchpadlibrarian.net/32674714/cpuinfo.T2500.bug31985376.kvm_with_coreduo_no-nx.txt

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Certain VMs do not run under KVM using karmic's kernel
https://bugs.launchpad.net/bugs/379991
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