touch-packages team mailing list archive

["Stephen M. Webb" <stephen.webb@xxxxxxxxxxxxx>]

** Description changed:

- This appears to be a regression in 14.10 sometime in September 2014.
- 
- The behavior appears similar to this bug from 2011:
- https://bugs.launchpad.net/unity-2d/+bug/830348
+ [Impact]
  
  On resume from suspend, screen contents are displayed for a brief time
  (perhaps 0.5 to 1 sec)  before the lock dialog appears.
  
  These screen contents are not always the desktop or open application
  beneath the lock screen. On at least one occasion, the screen showed
  content from a full-screen video that had been playing in Firefox some
  time before the computer had been suspended: neither the video nor its
  underlying tab were open anymore, so the image(s) was likely part of a
  buffer somewhere. (Needless to say, if the wrong full-screen video had
  been watched, depending on the setting, this could be a quite serious
  issue for some users).
  
- I have not exhaustively tested conditions in which this appears.
- However, just now, the bug did not appear when keeping the lid open,
- suspending, and then resuming with the power button.
+ [Test Case]
  
- But when suspending from menu, closing the lid, then opening the lid and
- moving the mouse, the screen displayed contents before showing the lock
- dialog.  The image displayed was of the desktop (with this bug reporting
- window) and showed the "suspend" item in the power menu being
- highlighted/clicked.
+ Suspend and resume the computer (closing the lid or using the session
+ indicator).  Since this problem involves a race condition, it is not
+ reliably reproducable at will.
  
- ProblemType: Bug
- DistroRelease: Ubuntu 14.10
- Package: unity 7.3.1+14.10.20140915-0ubuntu1
- ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3
- Uname: Linux 3.16.0-18-generic x86_64
- ApportVersion: 2.14.7-0ubuntu2
- Architecture: amd64
- CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
- CurrentDesktop: Unity
- Date: Mon Sep 29 08:38:57 2014
- InstallationDate: Installed on 2014-08-10 (50 days ago)
- InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
- SourcePackage: unity
- UpgradeStatus: Upgraded to utopic on 2014-08-10 (50 days ago)
+ [Regression Potential]
+ 
+ This fix unmaps windows when a suspend or shutdown event occurs:  it is
+ possible that the window(s) do not get remapped when a wake event
+ occurs, or the wake even does not get propagated.  This does not appear
+ to occur in practice.
+ 
+ [Other Info]
+ 
+ The Ubuntu 14.04 LTS SRU was cherry-picked from upstream Unity where it
+ has been released in the Ubuntu "Vivid Vervet" development release for a
+ couple of months with no apparent regressions.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unity in Ubuntu.
https://bugs.launchpad.net/bugs/1375271

Title:
  desktop or other past screen contents visible before lockscreen on
  resume

Status in GNOME Screensaver:
  New
Status in Unity:
  Fix Committed
Status in Unity 7.2 series:
  In Progress
Status in unity package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

  On resume from suspend, screen contents are displayed for a brief time
  (perhaps 0.5 to 1 sec)  before the lock dialog appears.

  These screen contents are not always the desktop or open application
  beneath the lock screen. On at least one occasion, the screen showed
  content from a full-screen video that had been playing in Firefox some
  time before the computer had been suspended: neither the video nor its
  underlying tab were open anymore, so the image(s) was likely part of a
  buffer somewhere. (Needless to say, if the wrong full-screen video had
  been watched, depending on the setting, this could be a quite serious
  issue for some users).

  [Test Case]

  Suspend and resume the computer (closing the lid or using the session
  indicator).  Since this problem involves a race condition, it is not
  reliably reproducable at will.

  [Regression Potential]

  This fix unmaps windows when a suspend or shutdown event occurs:  it
  is possible that the window(s) do not get remapped when a wake event
  occurs, or the wake even does not get propagated.  This does not
  appear to occur in practice.

  [Other Info]

  The Ubuntu 14.04 LTS SRU was cherry-picked from upstream Unity where
  it has been released in the Ubuntu "Vivid Vervet" development release
  for a couple of months with no apparent regressions.

To manage notifications about this bug go to:
https://bugs.launchpad.net/gnome-screensaver/+bug/1375271/+subscriptions