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[Norbert <1080674@xxxxxxxxxxxxxxxxxx>]

I can confirm this bug on Ubuntu 12.04.5 host with the following guests:
* Ubuntu 12.04.5 i386 guest (default qemu-kvm = "kvm -m 1024 -cdrom ubuntu-12.04.5-desktop-i386.iso" )

** Attachment added: "Ubuntu 12.04.5 i686 guest, default kvm.png"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1080674/+attachment/4359601/+files/Ubuntu%2012.04.5%20i686%20guest%2C%20default%20kvm.png

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https://bugs.launchpad.net/bugs/1080674

Title:
  [QEMU] Corrupted desktop screen for raring desktop installation in
  QEMU guest (Cirrus graphics).  Affects KVM but not VBox.

Status in Cairo Graphics Library:
  Confirmed
Status in cairo package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Invalid
Status in xserver-xorg-video-cirrus package in Ubuntu:
  Won't Fix

Bug description:
  The desktop screen appears corrupted after raring desktop
  installation. Please see attached screenshot for how it looks. Going
  through System settings -> Appearance and selecting different wall
  papers does not solve the isssue.

  Test Steps:
  1. Install Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20121119)
  2. Reboot after the installation and log in

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: unity 6.12.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.7.0-2.8-generic 3.7.0-rc5
  Uname: Linux 3.7.0-2-generic i686
  .tmp.unity.support.test.1:
   
  ApportVersion: 2.6.2-0ubuntu3
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CurrentDmesg: [   18.945219] hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj.
  Date: Mon Nov 19 12:26:26 2012
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  GraphicsCard:
   Cirrus Logic GD 5446 [1013:00b8] (prog-if 00 [VGA controller])
     Subsystem: Red Hat, Inc Device [1af4:1100]
  InstallationDate: Installed on 2012-11-19 (0 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20121119)
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-2-generic root=UUID=131c13a4-8227-4946-8a1f-2aaa6043670d ro quiet splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs
  version.compiz: compiz 1:0.9.8.4+bzr3412-0ubuntu1
  version.libdrm2: libdrm2 2.4.39-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.4-0ubuntu1
  xserver.bootTime: Mon Nov 19 12:23:11 2012
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        AT Translated Set 2 keyboard KEYBOARD, id 7
   input        ImExPS/2 Generic Explorer Mouse MOUSE, id 8
  xserver.errors: open /dev/dri/card0: No such file or directory
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.13.0-0ubuntu7

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