Hi, I have the latest kvm as part of rolling release of manajaro. When using windows 7 guest with the following settings(virt-manager xml file), I find the entire host freezes. Any ideas? $dmidecode | grep Product Product Name: ProLiant ML330 G6 String 2: Product ID: 504271-B21 settings: /domain/@type=kvm /domain/name=g10 /domain/uuid=55eca026-8833-4dbf-bbc2-1775113b6dbf /domain/memory/@unit=KiB /domain/memory=4194304 /domain/currentMemory/@unit=KiB /domain/currentMemory=4194304 /domain/vcpu/@placement=static /domain/vcpu=2 /domain/os/type/@arch=x86_64 /domain/os/type/@machine=pc-i440fx-2.8 /domain/os/type=hvm /domain/os/bootmenu/@enable=no /domain/features/hyperv/relaxed/@state=on /domain/features/hyperv/vapic/@state=on /domain/features/hyperv/spinlocks/@state=on /domain/features/hyperv/spinlocks/@retries=8191 /domain/cpu/@mode=host-model /domain/cpu/model/@fallback=allow /domain/clock/@offset=localtime /domain/clock/timer/@name=rtc /domain/clock/timer/@tickpolicy=catchup /domain/clock/timer/@name=pit /domain/clock/timer/@tickpolicy=delay /domain/clock/timer/@name=hpet /domain/clock/timer/@present=no /domain/clock/timer/@name=hypervclock /domain/clock/timer/@present=yes /domain/on_poweroff=destroy /domain/on_reboot=restart /domain/on_crash=restart /domain/pm/suspend-to-mem/@enabled=no /domain/pm/suspend-to-disk/@enabled=no /domain/devices/emulator=/usr/sbin/qemu-system-x86_64 /domain/devices/disk/@type=file /domain/devices/disk/@device=disk /domain/devices/disk/driver/@name=qemu /domain/devices/disk/driver/@type=qcow2 /domain/devices/disk/driver/@cache=unsafe /domain/devices/disk/driver/@io=threads /domain/devices/disk/source/@file=/var/lib/libvirt/images/win7.qcow2 /domain/devices/disk/target/@dev=vda /domain/devices/disk/target/@bus=virtio /domain/devices/disk/boot/@order=1 /domain/devices/disk/address/@type=pci /domain/devices/disk/address/@domain=0x0000 /domain/devices/disk/address/@bus=0x00 /domain/devices/disk/address/@slot=0x05 /domain/devices/disk/address/@function=0x0 /domain/devices/disk/@type=file /domain/devices/disk/@device=cdrom /domain/devices/disk/driver/@name=qemu /domain/devices/disk/driver/@type=raw /domain/devices/disk/source/@file=/root/en_windows_7_professional_n_with_sp1_x64_dvd_u_677207.iso /domain/devices/disk/target/@dev=hdb /domain/devices/disk/target/@bus=ide /domain/devices/disk/address/@type=drive /domain/devices/disk/address/@controller=0 /domain/devices/disk/address/@bus=0 /domain/devices/disk/address/@target=0 /domain/devices/disk/address/@unit=1 /domain/devices/disk/@type=file /domain/devices/disk/@device=floppy /domain/devices/disk/driver/@name=qemu /domain/devices/disk/driver/@type=raw /domain/devices/disk/driver/@cache=unsafe /domain/devices/disk/driver/@io=threads /domain/devices/disk/source/@file=/root/virtio-win_amd64.vfd /domain/devices/disk/target/@dev=fda /domain/devices/disk/target/@bus=fdc /domain/devices/disk/address/@type=drive /domain/devices/disk/address/@controller=0 /domain/devices/disk/address/@bus=0 /domain/devices/disk/address/@target=0 /domain/devices/disk/address/@unit=0 /domain/devices/controller/@type=usb /domain/devices/controller/@index=0 /domain/devices/controller/@model=ich9-ehci1 /domain/devices/controller/address/@type=pci /domain/devices/controller/address/@domain=0x0000 /domain/devices/controller/address/@bus=0x00 /domain/devices/controller/address/@slot=0x04 /domain/devices/controller/address/@function=0x7 /domain/devices/controller/@type=usb /domain/devices/controller/@index=0 /domain/devices/controller/@model=ich9-uhci1 /domain/devices/controller/master/@startport=0 /domain/devices/controller/address/@type=pci /domain/devices/controller/address/@domain=0x0000 /domain/devices/controller/address/@bus=0x00 /domain/devices/controller/address/@slot=0x04 /domain/devices/controller/address/@function=0x0 /domain/devices/controller/address/@multifunction=on /domain/devices/controller/@type=usb /domain/devices/controller/@index=0 /domain/devices/controller/@model=ich9-uhci2 /domain/devices/controller/master/@startport=2 /domain/devices/controller/address/@type=pci /domain/devices/controller/address/@domain=0x0000 /domain/devices/controller/address/@bus=0x00 /domain/devices/controller/address/@slot=0x04 /domain/devices/controller/address/@function=0x1 /domain/devices/controller/@type=usb /domain/devices/controller/@index=0 /domain/devices/controller/@model=ich9-uhci3 /domain/devices/controller/master/@startport=4 /domain/devices/controller/address/@type=pci /domain/devices/controller/address/@domain=0x0000 /domain/devices/controller/address/@bus=0x00 /domain/devices/controller/address/@slot=0x04 /domain/devices/controller/address/@function=0x2 /domain/devices/controller/@type=pci /domain/devices/controller/@index=0 /domain/devices/controller/@model=pci-root /domain/devices/controller/@type=ide /domain/devices/controller/@index=0 /domain/devices/controller/address/@type=pci /domain/devices/controller/address/@domain=0x0000 /domain/devices/controller/address/@bus=0x00 /domain/devices/controller/address/@slot=0x01 /domain/devices/controller/address/@function=0x1 /domain/devices/controller/@type=fdc /domain/devices/controller/@index=0 /domain/devices/interface/@type=bridge /domain/devices/interface/mac/@address=52:54:00:71:9e:f2 /domain/devices/interface/source/@bridge=bridge1 /domain/devices/interface/model/@type=virtio /domain/devices/interface/address/@type=pci /domain/devices/interface/address/@domain=0x0000 /domain/devices/interface/address/@bus=0x00 /domain/devices/interface/address/@slot=0x03 /domain/devices/interface/address/@function=0x0 /domain/devices/serial/@type=pty /domain/devices/serial/target/@port=0 /domain/devices/console/@type=pty /domain/devices/console/target/@type=serial /domain/devices/console/target/@port=0 /domain/devices/input/@type=mouse /domain/devices/input/@bus=ps2 /domain/devices/input/@type=keyboard /domain/devices/input/@bus=ps2 /domain/devices/graphics/@type=vnc /domain/devices/graphics/@port=-1 /domain/devices/graphics/@autoport=yes /domain/devices/graphics/listen/@type=address /domain/devices/video/model/@type=vga /domain/devices/video/model/@vram=16384 /domain/devices/video/model/@heads=1 /domain/devices/video/model/@primary=yes /domain/devices/video/address/@type=pci /domain/devices/video/address/@domain=0x0000 /domain/devices/video/address/@bus=0x00 /domain/devices/video/address/@slot=0x02 /domain/devices/video/address/@function=0x0 /domain/devices/memballoon/@model=virtio /domain/devices/memballoon/address/@type=pci /domain/devices/memballoon/address/@domain=0x0000 /domain/devices/memballoon/address/@bus=0x00 /domain/devices/memballoon/address/@slot=0x06 /domain/devices/memballoon/address/@function=0x0 thanks sudhakar