Host system: openSuSE 13.2 + kernel 4.0.0-rc4 + qemu 2.2.1.
When I try to boot a virtual machine with Ubuntu 14.10 and kernel 3.13.0 every boot succeeds. However, with kernel 3.19.2 booting fails most of the time. The following appears in /var/log/libvirt/qemu/ubuntu-vm.log when I try to boot that VM with kernel 3.19.2:
2015-03-23 02:44:18.801+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=spice /usr/bin/qemu-system-x86_64 -name ubuntu-vm -S -machine pc-i440fx-2.1,accel=kvm,usb=off -cpu Haswell -m 2048 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid 395110dc-9fbe-4542-8fce-4ef958f24b2c -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/ubuntu-vm.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive file=/var/lib/libvirt/images/ubuntusaucy.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/var/lib/libvirt/images/ubuntu-14.04-mini.iso,if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=2 -netdev tap,fd=22,id=hostnet0,vhost=on,vhostfd=23 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:5e:71:5e,bus=pci.0,addr=0x3 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -chardev spicevmc,id=charredir2,name=usbredir -device usb-redir,chardev=charredir2,id=redir2 -chardev spicevmc,id=charredir3,name=usbredir -device usb-redir,chardev=charredir3,id=redir3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -object rng-random,id=rng0,filename=/dev/random -device virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x9 -msg timestamp=on
main_channel_link: add main channel client
main_channel_handle_parsed: net test: latency 0.229000 ms, bitrate 28444444444 bps (27126.736111 Mbps)
red_dispatcher_set_cursor_peer:
inputs_connect: inputs channel client create
((null):30728): SpiceWorker-ERROR **: red_worker.c:8337:red_marshall_qxl_drawable: invalid type
KVM: injection failed, MSI lost (Input/output error)
qemu-system-x86_64: /home/bart/software/qemu-2.2.1/hw/net/vhost_net.c:264: vhost_net_stop_one: Assertion `r >= 0' failed.
2015-03-23 02:44:44.952+0000: shutting down
That message is similar to the message reported by the older qemu version provided by openSuse (qemu 2.1.0 + qemu-kvm 2.1.0):
2015-03-21 13:51:00.724+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=spice /usr/bin/qemu-system-x86_64 -name ubuntu-vm -S -machine pc-i440fx-2.1,accel=kvm,usb=off -cpu Haswell -m 1024 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid 395110dc-9fbe-4542-8fce-4ef958f24b2c -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/ubuntu-vm.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr
=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/var/lib/libvirt/images/ubuntusaucy.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/var/lib/libvirt/images/ubuntu-14.04-mini.iso,if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id
=ide0-0-0,bootindex=2 -netdev tap,fd=22,id=hostnet0,vhost=on,vhostfd=23 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:5e:71:5e,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 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,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 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,
name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -chardev spicevmc,id=charredir2,name=usbredir -device usb-redir,chardev=charredir2,id=redir2 -chardev spicevmc,id=charredir3,name=usbredir -device usb-redir,chardev=charredir3,id=redir3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -object rng-random,id=rng0,filename=/dev/random -device virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x9 -msg timestamp=on
char device redirected to /dev/pts/0 (label charserial0)
main_channel_link: add main channel client
main_channel_handle_parsed: net test: latency 0.233000 ms, bitrate 17964912280 bps (17132.675438 Mbps)
red_dispatcher_set_cursor_peer:
inputs_connect: inputs channel client create
((null):5798): SpiceWorker-ERROR **: red_worker.c:8337:red_marshall_qxl_drawable: invalid type
red_channel_client_disconnect: 0x7f90397ec0c0 (channel 0x7f903812a090 type 5 id 0)
((null):8349): Spice-Warning **: red_channel.c:1661:red_channel_remove_client: channel type 5 id 0 - channel->thread_id (0x7f90362cba80) != pthread_self (0x7f9011fff700).If one of the threads is != io-thread && != vcpu-thread, this might be a BUG
snd_channel_put: sound channel freed
red_channel_client_disconnect: 0x7f903a04c4c0 (channel 0x7f903812a230 type 6 id 0)
((null):8349): Spice-Warning **: red_channel.c:1661:red_channel_remove_client: channel type 6 id 0 - channel->thread_id (0x7f90362cba80) != pthread_self (0x7f9011fff700).If one of the threads is != io-thread && != vcpu-thread, this might be a BUG
snd_channel_put: sound channel freed
KVM: injection failed, MSI lost (Input/output error)
qemu-system-x86_64: /home/abuild/rpmbuild/BUILD/qemu-2.1.0/hw/virtio/vhost.c:1003: vhost_virtqueue_mask: Assertion `r >= 0' failed.
2015-03-21 15:30:10.148+0000: shutting down
The following patch might fix this (I have not yet tested this patch myself): https:/