** Description changed:

- I run Ubuntu 18.04 in Virtualbox 5.2.6 with as host OS; Ubuntu 17.10 with the 
propriety Nvidia driver 340 as suggested by Ubuntu. 
+ I run Ubuntu 18.04 in Virtualbox 5.2.6 with as host OS; Ubuntu 17.10 with the 
propriety Nvidia driver 340 as suggested by Ubuntu.
  The screen almost freezes completely as soon as I maximise any window in the 
guest OS Ubuntu 18.04. Any mouse click takes 10-60 seconds before the system 
reacts to it. It took a long time to generate this bug-report.
  
  I had the same problem with Ubuntu 17.10, while Guest OSes Ubuntu Mate
- 17.10, Xubuntu 17.10, Peppermint 8 and Windows 7 and 10 work without any
- problem.
+ 17.10, Xubuntu 17.10, and Peppermint 8. Windows 7 and 10 work without
+ any problem.
+ 
+ WORKAROUND: Disable 3D acceleration.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu4
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.8-0ubuntu8
  Architecture: amd64
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Feb 11 06:31:52 2018
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Continuously
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter 
[80ee:beef] (prog-if 00 [VGA controller])
  InstallationDate: Installed on 2017-12-22 (50 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171219)
  Lsusb:
-  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
-  Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
-  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+  Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
+  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: innotek GmbH VirtualBox
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic 
root=UUID=f3311827-9a0c-490d-a707-d4d037152c4d ro quiet splash
  Renderer: Software
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: 
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.family: Virtual Machine
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.89-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.3.3-0ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.3.3-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

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Title:
  Xorg freeze

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