Comment 34 for bug 379991

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>