Hi, When trying to boot a Windows 7 install from a local virtual disks, qemu stops with the messages: KVM internal error. Suberror: 1 emulation failure I've started qemu with libvirt. This is the output from libvirt's logfile: 2014-01-07 18:22:10.988+0000: starting up LC_ALL=C PATH=/bin:/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin HOME=/ USER=root QEMU_AUDIO_DRV=spice /usr/bin/qemu-kvm -name win7_master,process=qemu:win7_master -S -machine pc- i440fx-1.7,accel=kvm,usb=off -m 4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid 0d640aa9-a88c-164b-398c-14186445d2a8 -no- user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7_master.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no- shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device ahci,id=ahci0,bus=pci.0,addr=0x7 -device virtio-serial-pci,id=virtio- serial0,bus=pci.0,addr=0x5 -drive file=/virtual_disks/systemrescuecd- x86-3.8.1.iso,if=none,id=drive-ide0-0-1,readonly=on,format=raw,cache=none - device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive file=/virtual_disks/win7_master.img,if=none,id=drive- sata0-0-0,format=qcow2,cache=none -device ide-hd,bus=ahci0.0,drive=drive- sata0-0-0,id=sata0-0-0,bootindex=1 -netdev tap,fd=22,id=hostnet0 -device e1000,netdev=hostnet0,id=net0,mac=52:54:00:e1:63:d3,bus=pci.0,addr=0x3 - chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 - chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio- serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 - device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable- ticketing,seamless-migration=on -k de -device VGA,id=video0,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0- codec0,bus=sound0.0,cad=0 -device virtio-balloon- pci,id=balloon0,bus=pci.0,addr=0x6 char device redirected to /dev/pts/3 (label charserial0) ((null):14946): SpiceWorker-Warning **: red_worker.c:11477:dev_destroy_primary_surface: double destroy of primary surface ((null):14946): SpiceWorker-Warning **: red_worker.c:9663:red_create_surface: condition `surface->context.canvas' reached main_channel_link: add main channel client main_channel_handle_parsed: net test: latency 0.137000 ms, bitrate 9799043062 bps (9345.095694 Mbps) red_dispatcher_set_cursor_peer: inputs_connect: inputs channel client create KVM internal error. Suberror: 1 emulation failure EAX=00000200 EBX=0000aa55 ECX=00000007 EDX=00000080 ESI=00007bd0 EDI=00000800 EBP=000007be ESP=00007be0 EIP=00000684 EFL=00003202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 ffffffff 00809300 CS =0000 00000000 ffffffff 00809b00 SS =0000 00000000 ffffffff 00809300 DS =0000 00000000 ffffffff 00809300 FS =0000 00000000 ffffffff 00809300 GS =0000 00000000 ffffffff 00809300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 000f69e0 00000037 IDT= 00000000 000003ff CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=7c 68 01 00 68 10 00 b4 42 8a 56 00 8b f4 cd 13 9f 83 c4 10 <9e> eb 14 b8 01 02 bb 00 7c 8a 56 00 8a 76 01 8a 4e 02 8a 6e 03 cd 13 66 61 73 1c fe 4e 11 qemu: terminating on signal 15 from pid 3795 2014-01-07 18:22:15.777+0000: shutting down This happened with qemu 1.5 and 1.7. The linux kernel in use is 3.10.25-gentoo The host CPU looks like this in lscpu: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 26 Stepping: 5 CPU MHz: 1600.000 BogoMIPS: 5345.33 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 8192K NUMA node0 CPU(s): 0-7 The Windows install in question is an image that has been pulled from a working Windows 7 install (on a physical machine). Guido -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html