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Old-enough RHEL6 machine types used '1' as the serial number of USB HID devices.  This should not change upon migration.

This should be doable upstream too.

RHEL6 is also not migrating the devices for those old versions.  This is a hack and is not needed in RHEL7.

Likewise, usb-hub and usb-storage need fixed serial numbers for machine types rhel-6.3.0 and older, and usb-ccid for all rhel-6*.

Fix included in qemu-kvm-1.5.3-7.el7

Verified on qemu-kvm-1.5.3-19.el7.x86_64:

1. boot guest with:

#/usr/libexec/qemu-kvm -enable-kvm -smp 4 -m 4G -name rhel6.3-64 -uuid 3f2ea5cd-3d29-48ff-aab2-23df1b6ae213 -boot order=cd -monitor stdio -usb -device usb-tablet,id=input0,serial=123456 -vnc :10 -monitor tcp::1234,server,nowait -nodefaults -drive file=RHEL-Server-7.0-64-virtio.qcow2,cache=none,if=none,rerror=stop,werror=stop,id=drive-virtio-disk0,format=qcow2,aio=native -device virtio-blk-pci,drive=drive-virtio-disk0,id=device-virtio-disk0,bootindex=1 -vga cirrus


2. in guest:

# lsusb -v

...
iSerial 5 123456
...

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.