Hi David, Thanks for the response. I've already cross checked my BIOS setting and virtualization is enabled. the output of cat /proc/cpuinfo shows vmx flag, but it doesn't show smx flag. Is that has something to do with my issue? Thanks, kenden <div class="gmail_quote">On Thu, Jan 12, 2012 at 8:23 PM, David M. Barlieb <<a href="mailto:DMB@integrichain.com">DMB@integrichain.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div link="blue" vlink="purple" lang="EN-US"> <div> I had a similar issue on my rhel6.1 host, I had to enable virtualization in the system bios. <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:libvirt-users-bounces@redhat.com" target="_blank">libvirt-users-bounces@redhat.com</a> [mailto:<a href="mailto:libvirt-users-bounces@redhat.com" target="_blank">libvirt-users-bounces@redhat.com</a>] On Behalf Of Nitin Nikam Sent: Thursday, January 12, 2012 9:46 AM To: <a href="mailto:libvirt-users@redhat.com" target="_blank">libvirt-users@redhat.com</a> Subject: [libvirt-users] virt-install Error </div><div><div class="h5"> Hi All, I'm trying to install a VM on host OS (Redhat 6.1, KVM hypervisor). I've installed all the required RPMs for KVM and libvirt tools. Here is the list of libvirt RPMs and KVM modules kvm.ko kvm-intel.ko libvirt-0.8.7-18.el6.x86_64.rpm libvirt-java-devel-0.4.7-1.el6.noarch.rpm virt-top-1.0.4-3.8.el6.x86_64.rpm libvirt-client-0.8.7-18.el6.x86_64.rpm libvirt-python-0.8.7-18.el6.x86_64.rpm virt-viewer-0.2.1-3.el6.x86_64.rpm libvirt-devel-0.8.7-18.el6.x86_64.rpm python-virtinst-0.500.5-3.el6.noarch.rpm virt-what-1.3-4.4.el6.x86_64.rpm libvirt-java-0.4.7-1.el6.noarch.rpm virt-manager-0.8.6-4.el6.noarch.rpm qemu-img-0.12.1.2-2.160.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.160.el6.x86_64.rpm When I execute virt-install command I see the below error: [root@nsn /]# virt-install ERROR Host does not support any virtualization options I've already cross checked the VMX setting in BIOS and it is enabled. In VMX Feature MSR register , VT bit is set. Following is some info about the platform: [root@nsn /]# uname -a Linux rsp3-linux 2.6.32.27 #170 SMP PREEMPT Thu Jan 12 09:03:12 IST 2012 x86_64 GNU/Linux [root@nsn /]# cat /proc/cpuinfo processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 30 model name : Intel(R) Xeon(R) CPU C5528 @ 2.13GHz stepping : 4 cpu MHz : 2127.723 cache size : 8192 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 6 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid bogomips : 4259.94 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: [root@nsn /]# lsmod | grep kvm kvm_intel 36839 0 - Live 0xffffffffa016c000 kvm 149478 1 kvm_intel, Live 0xffffffffa0137000 has anyone encountered similar issues while using libvirt tools? am I missing something w.r.t installation? Appreciate your feedback. Thanks, kenden </div></div></div> </div> </blockquote></div>