Hi All, I'm running: kvm-qemu-img-83-164.el5 kvm-83-164.el5 kernel-2.6.18-194.8.1.el5 libvirt-python-0.6.3-33.el5 virt-viewer-0.0.2-3.el5 kernel-2.6.18-194.el5 etherboot-zroms-kvm-5.4.4-13.el5.centos kmod-kvm-83-164.el5 kernel-devel-2.6.18-194.8.1.el5.centos.plus libvirt-0.6.3-33.el5 python-virtinst-0.400.3-9.el5 kvm-tools-83-164.el5 virt-manager-0.6.1-12.el5 on HP ProLiant DL380 G6. Basically it works ok, quite stably running 10 VMs .. the only problem I've got is the following: Sometime initiating 'shutdown' from guest OS (linux only), kvm host locks up for several seconds (15-30) and also all of the VMs hosted on this host become inaccessible as well. In 100% cases if I do 'Force shutdown' (from Virtual Machine Manager) of a VM, consequent VMs re-start results in kvm host locking up for some seconds as well .. Does anybody experience something similar ? I've tested Ubuntu Server 10.04.1 LTS on the same hardware with 'latest/greatest' kernel | kvm and it doesn't have this problem. Regards, Vladimir