Before
2016-01-24 18:10:32.087+0000: starting up libvirt version: 1.2.18, qemu version: 2.3.0
LC_ALL=C PATH=/bin:/sbin:/usr/bin:/usr/sbin HOME=/ QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -name Amaral -S -machine pc-i440fx-2.3,accel=kvm,usb=off,mem-merge=off -cpu host -m 16384 -realtime mlock=on -smp 8,sockets=1,cores=8,threads=1 -uuid ce095b34-4ff6-2b4b-4617-5a012bf4bf23 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Amaral.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/mnt/user/domains/Amaral/vdisk1.img,if=none,id=drive-virtio-disk2,format=raw,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk2,id=virtio-disk2,bootindex=1 -drive file=/mnt/user/arrayvidsks/Amaral/vdisk2.img,if=none,id=drive-virtio-disk3,format=revice ioh3420,bus=pci.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1 -device vfio-pci,host=04:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on -device vfio-pci,host=00:1b.0,bus=root.1,addr=01.0 -msg timestamp=on
Domain id=1 is tainted: high-privileges
Domain id=1 is tainted: custom-argv
Domain id=1 is tainted: host-cpu
char device redirected to /dev/pts/0 (label charserial0)
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
qemu-system-x86_64: hw/usb/core.c:551: usb_packet_check_state: Assertion `!"usb packet state check failed"' failed.
2016-01-24 18:10:53.017+0000: shutting down
After
2016-01-24 18:14:29.306+0000: starting up libvirt version: 1.2.18, qemu version: 2.3.0
LC_ALL=C PATH=/bin:/sbin:/usr/bin:/usr/sbin HOME=/ QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -name Amaral -S -machine pc-i440fx-2.3,accel=kvm,usb=off,mem-merge=off -cpu Haswell-noTSX,+abm,+pdpe1gb,+rdrand,+f16c,+osxsave,+dca,+pdcm,+xtpr,+tm2,+est,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 16384 -realtime mlock=on -smp 8,sockets=1,cores=8,threads=1 -uuid ce095b34-4ff6-2b4b-4617-5a012bf4bf23 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Amaral.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/mnt/user/domains/Amaral/vdisk1.img,if=none,id=drive-virtio-disk2,format=raw,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=dr4,hostaddr=3,id=hostdev0 -device usb-host,hostbus=1,hostaddr=7,id=hostdev1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -device ioh3420,bus=pci.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1 -device vfio-pci,host=04:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on -device vfio-pci,host=00:1b.0,bus=root.1,addr=01.0 -msg timestamp=on
Domain id=2 is tainted: high-privileges
Domain id=2 is tainted: custom-argv
char device redirected to /dev/pts/0 (label charserial0)
libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=28
qemu-system-x86_64: hw/usb/core.c:551: usb_packet_check_state: Assertion `!"usb packet state check failed"' failed.
2016-01-24 18:22:00.841+0000: shutting down
And vm freezes again, i m getting some libusb error