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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

** No longer affects: xorg (Ubuntu)

** No longer affects: xserver-xorg-driver-vesa (Ubuntu)

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https://bugs.launchpad.net/bugs/1437536

Title:
  Screen corruption under KVM

Status in xorg-server package in Ubuntu:
  New

Bug description:
  I was experimenting with Ubuntu MATE, and I found severe screen
  corruption whenever I run the image under a KVM virtual machine. I
  attached a screenshot. I don't think the problem is Ubuntu MATE
  specific. I also found it doesn't depend on the display manager. (It
  can be either LightDM or GDM.)

  Reproduce instructions:
  1. Boot up a KVM virtual machine with an Ubuntu Vivid Vervet image.
  2. Put some stress on the display: what I used to do is to launch Firefox and htop in a terminal, then lock the screen, or let it lock by itself.
  3. Wait a little, then unlock the computer.
  4. You'll see letters missing and images corrupted, like on the attached screenshot.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.16.2-0ubuntu5
  Architecture: amd64
  Date: Sat Mar 28 02:04:36 2015
  InstallationDate: Installed on 2015-03-27 (0 days ago)
  InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  ProcEnviron:
   LANGUAGE=hu
   TERM=xterm
   PATH=(custom, no user)
   LANG=hu_HU.UTF-8
   SHELL=/bin/bash
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)

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