VNC based installation does not interpret key strokes correctly.

Problem Description
=====================
Ubuntu 14.10 VNC mode installation process does not interpret key strokes correctly.

---uname output---
Ubuntu daily build dated Oct 6th 2014

Machine Type = 8284-22A

System Hang
==========
 During VNC mode installation, whenever the installer asks for input (for example password for a user) , it does not interpret key inputs properly.

One example : When I type Sachin as a user name, the installer screen interprets it as Saachiin or Saccchhiiin.

I have observed similar behavior post installation as well (while typing in VNC console)

sachin@ubuntu:~$ cd /etcc/
-bash: cd: /etcc/: No such file or directory
sachin@ubuntu:~$ lls
No command 'lls' found, did you mean:
.....

Steps to Reproduce
=======================
1. define and start the below xml for VNC based installation.
[root@lep8a ISO]# qemu-img create -f qcow2 /var/lib/libvirt/images/manu/ubuntu14_10_VNC.qcow2 60G
Formatting '/var/lib/libvirt/images/manu/ubuntu14_10_VNC.qcow2', fmt=qcow2 size=64424509440 encryption=off cluster_size=65536 lazy_refcounts=off

[root@lep8a new]# virsh dumpxml GMT_ubuntu14_10_VNC
<domain type='kvm'>
  <name>GMT_ubuntu14_10_VNC</name>
  <uuid>bd45e5dd-9c10-4729-9b9b-da8fe136a45d</uuid>
  <memory unit='KiB'>4194304</memory>
  <currentMemory unit='KiB'>4194304</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='ppc64' machine='pseries'>hvm</type>
    <boot dev='hd'/>
    <boot dev='cdrom'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-ppc64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/manu/ubuntu14_10_VNC.qcow2'/>
      <target dev='hda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/manu/ISO/utopic-server-ppc64el_oct6.iso'/>
      <target dev='sdb' bus='scsi'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='scsi' index='0'>
      <address type='spapr-vio' reg='0x2000'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:c0:a8:7a:68'/>
      <source bridge='brenP6p1s0f0'/>
      <model type='e1000'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target type='isa-serial' port='0'/>
      <address type='spapr-vio' reg='0x30000000'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
      <address type='spapr-vio' reg='0x30000000'/>
    </console>
    <input type='keyboard' bus='usb'/>
    <input type='mouse' bus='usb'/>
    <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' keymap='en-us'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='vga' vram='9216' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'/>
</domain>

[root@lep8a new]# virsh start --console GMT_ubuntu14_10_VNC
Domain GMT_ubuntu14_10_VNC started
Connected to domain GMT_ubuntu14_10_VNC
Escape character is ^]

SLOF **********************************************************************
QEMU Starting
.......

2. verify the VNCport and enable the iptables on pkvm host to use the same.

[root@lep8a ISO]# virsh vncdisplay GMT_ubuntu14_10_VNC
:1
[root@lep8a ISO]# firewall-cmd --add-port 1/tcp
[root@lep8a ISO]#
[root@lep8a ISO]# firewall-cmd --add-service=vnc-server
Warning: ALREADY_ENABLED

3. using the vncviewer try to connect to the <pkVMhostIP:1>
the vncviewer connects and the install begins. I have used Vinagre (a remote desktop viewer for the GNOME desktop)

Install ISO Information: utopic-server-ppc64el_Oct6.iso