[Bug 987941] Re: Ubuntu Installer Slideshow - Severe tearing when changing slides

[Dylan McCall]

*** This bug is a duplicate of bug 987949 ***
    https://bugs.launchpad.net/bugs/987949

On Sun, Jun 24, 2012 at 10:43 PM, John M.K. <987941 at bugs.launchpad.net> wrote:
> *** This bug is a duplicate of bug 987949 ***
>    https://bugs.launchpad.net/bugs/987949
>
> @Dylan
>
> How about Unity?
>
> When you did full install, did your system default to Unity 2D or Unity
> 3D?
>
> If your system defaults to Unity 2D, which is wrong as your integrated
> graphics supports at least OpenGL 3.0, it means that this possibly still
> feels like a duplicate of bug #987949.

No, the system defaults to Unity 3d and happily deals with 3D stuff in
the live cd. I can't reproduce the tearing in either Unity 2D or Unity
3D. However, when I choose Install Ubuntu (which provides a very
simple session), I am able to reproduce the tearing in any Webkit
webview. The slideshow is the most obvious example, but you can also
open Yelp (the help viewer) and you will see the same tearing in there
if you scroll or trigger any animation.

I feel like you might be seeing two bugs at once here :) I have
definitely seen / heard about this one on lots of different machines,
but the problem seems to be limited to Webkit — while your other bug
report mentions tearing in lots of other places, too.

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https://bugs.launchpad.net/bugs/987941

Title:
  Ubuntu Installer Slideshow - Severe tearing when changing slides

Status in “ubiquity-slideshow-ubuntu” package in Ubuntu:
  Confirmed
Status in “webkit” package in Ubuntu:
  Confirmed

Bug description:
  I just installed Ubuntu 12.04 from a daily built.

  Aside from the installation being slower than usual, whenever I
  changed Slide on the Slideshow, severe tearing occured during
  transitions.

  Actually you could see randomly distributed and randomly sized grey
  rectangles moving along with the transitions.

  It is the first time I fully install Ubuntu 12.04, but I have never
  experienced the same issue with previous Ubuntu versions, as far as
  the slideshow goes. So, AFAIK it is a regression for my system

  Note: It might be the graphics drivers for my system to blame, I see
  noticable tearing whenever I move windows around, and smooth scrolling
  is noticably worse than it used to in Ubuntu 11.10.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity-slideshow-ubuntu (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: amd64
  Date: Tue Apr 24 20:19:49 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity-slideshow-ubuntu
  UpgradeStatus: No upgrade log present (probably fresh install)

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