Public bug reported:

When resuming from suspend, user session is closed.

Scenario:

I have open applications for work: Chromium, Emacs, etc. I'm using a
laptop (ThinkPad T410s).

When I close the lid, system goes to suspend.
When opening the lid, system resumes.

Expected: my user session is active, only locked when resuming; all
previously open applications have saved their state, so I can continue
working.

What happens: my user session is closed, all my previously open
applications are closed, I have lost everything that was not saved.

I recall having seen a bug report about this same problem back in
2011/2012, and it has not been solved, apparently.

The workaround suggested back then was to disable screen lock when suspending, 
to prevent this from happening when resuming.
This is akin to having a problematic door lock, and suggesting leaving your 
house door open to avoid issues.

ProblemType: Bug
DistroRelease: elementary 0.4.1 (based on Ubuntu 16.04 LTS)
Package: gnome-screensaver (not installed)
ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
Uname: Linux 4.4.0-97-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia wl
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Pantheon
Date: Thu Oct 26 12:23:04 2017
InstallationDate: Installed on 2017-09-24 (31 days ago)
InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170814)
SourcePackage: gnome-screensaver
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-screensaver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug loki

** Description changed:

  When resuming from suspend, user session is closed.
  
  Scenario:
  
  I have open applications for work: Chromium, Emacs, etc. I'm using a
  laptop (ThinkPad T410s).
  
  When I close the lid, system goes to suspend.
  When opening the lid, system resumes.
  
  Expected: my user session is active, only locked when resuming; all
  previously open applications have saved their state, so I can continue
  working.
  
  What happens: my user session is closed, all my previously open
  applications are closed, I have lost everything that was not saved.
  
  I recall having seen a bug report about this same problem back in
  2011/2012, and it has not been solved, apparently.
  
  The workaround suggested back then was to disable screen lock when 
suspending, to prevent this from happening when resuming.
  This is akin to having a problematic door lock, and suggesting leaving your 
house door open to avoid issues.
  
  ProblemType: Bug
  DistroRelease: elementary 0.4.1 (based on Ubuntu 16.04 LTS)
  Package: gnome-screensaver (not installed)
  ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
  Uname: Linux 4.4.0-97-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia wl
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CurrentDesktop: Pantheon
- Date: Thu Oct 26 12:29:44 2017
- InstallationDate: Installed on 2017-09-24 (24 days ago)
- InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170814)
- SourcePackage: gnome-screensaver
- Symptom: security
- Title: Screen locking issue
- UpgradeStatus: No upgrade log present (probably fresh install)
- 
- ProblemType: Bug
- DistroRelease: elementary 0.4.1
- Package: gnome-screensaver (not installed)
- ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
- Uname: Linux 4.4.0-97-generic x86_64
- NonfreeKernelModules: nvidia_uvm nvidia wl
- ApportVersion: 2.20.1-0ubuntu2.10
- Architecture: amd64
- CurrentDesktop: Pantheon
  Date: Thu Oct 26 12:23:04 2017
  InstallationDate: Installed on 2017-09-24 (31 days ago)
  InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170814)
  SourcePackage: gnome-screensaver
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1727771

Title:
  When resuming from suspend, user session is closed

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