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[johnvillar <johnvillarzavatti@xxxxxxxxx>]

Can confirm it happens on Chromium and Chrome. It seems it happens when
there's a page "tile" that hasn't been rendered and the cache struggles
to keep up. Attached a screen of both browsers open showing the bug at
the same time.

** Attachment added: "Chrome and Chromium exhibiting cache rendering pressure failure"
   https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1334679/+attachment/4388692/+files/garbled%20screen

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https://bugs.launchpad.net/bugs/1334679

Title:
  Scrolling in Ubuntu causes garbled screen

Status in chromium-browser package in Ubuntu:
  Confirmed

Bug description:
  When I scroll in Chromium, especially when I use the mouse wheel, I
  often get a garbled screen. The attached PNG is an example from Drudge
  Report, a site with pretty simple HTML. Note how the text is
  discontinuous on the left and right sides.

  In case it matters, I am running Ubuntu as a guest OS in a VirtualBox
  VM.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: chromium-browser 34.0.1847.116-0ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
  Uname: Linux 3.13.0-29-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Jun 26 08:58:13 2014
  Desktop-Session:
   DESKTOP_SESSION = ubuntu
   XDG_CONFIG_DIRS = /etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg
   XDG_DATA_DIRS = /usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/
  DetectedPlugins:
   
  Env:
   MOZ_PLUGIN_PATH = None
   LD_LIBRARY_PATH = None
  InstallationDate: Installed on 2014-04-22 (64 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  SourcePackage: chromium-browser
  UpgradeStatus: No upgrade log present (probably fresh install)
  gconf-keys: /desktop/gnome/applications/browser/exec = b'/usr/bin/chromium-browser\n'/desktop/gnome/url-handlers/https/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/https/enabled = b'true\n'/desktop/gnome/url-handlers/http/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/http/enabled = b'true\n'/desktop/gnome/session/required_components/windowmanager = b''/apps/metacity/general/compositing_manager = b''/desktop/gnome/interface/icon_theme = b'gnome\n'/desktop/gnome/interface/gtk_theme = b'Clearlooks\n'
  modified.conffile..etc.default.chromium.browser: [deleted]
  mtime.conffile..etc.chromium.browser.default: 2014-04-25T11:23:01.642419

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