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 -- Certain VMs do not run under KVM using karmic's kernel https://bugs.launchpad.net/bugs/379991 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs