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[Bug 1299054] Re: resizing loop on high-dpi screen

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Andrea Azzarone <1299054@xxxxxxxxxxxxxxxxxx>
Date: Sat, 06 Dec 2014 14:34:11 -0000
Reply-to: Bug 1299054 <1299054@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: unity
       Status: New => Confirmed

** Changed in: unity
   Importance: Undecided => Medium

** Changed in: unity
    Milestone: None => 7.3.2

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https://bugs.launchpad.net/bugs/1299054

Title:
  resizing loop on high-dpi screen

Status in Unity:
  Confirmed
Status in unity package in Ubuntu:
  Confirmed

Bug description:
  When the global scaling factor is set to 2, some dialogs occasionally
  start changing their window size causing very high CPU activity.

  This occurs for example in dconf-editor while searching: It appears dconf-editor tries to adjust the window dimensions to the size of the content and reduces the window size until it is unusable. This causes very high CPU activity and freezes the window content.
  It also happens when (then) resizing the window width (→) or height (↓) afterwards, it tries to revert to the previous window size. However, the only way to resize the window back so that it doesn't reduce its size is by dragging the window corner (↓→).

  This issue happens also in other applications, for example in apport-
  dialogs when expanding the collapsed details view.

  This does not happen when the global scaling factor is set to 1. It
  could be related to the new window resizing method that updates the
  window content.

  org.gnome.desktop.interface.scaling-factor = 2

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.1.2+14.04.20140321-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
  Uname: Linux 3.13.0-17-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CurrentDesktop: Unity
  Date: Fri Mar 28 16:07:47 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-02-02 (53 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140201)
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)

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