[Bug 1615184] Re: screen lock and dpms broken in yakkety

[Rocko]

Luckily I had a snapshot from earlier. Bisecting upgrades shows that the
problem is in one of these packages:

libpam-systemd/yakkety 231-4 amd64 [upgradable from: 231-1]
libsystemd-dev/yakkety 231-4 amd64 [upgradable from: 231-1]
libsystemd0/yakkety 231-4 amd64 [upgradable from: 231-1]
systemd/yakkety 231-4 amd64 [upgradable from: 231-1]
systemd-sysv/yakkety 231-4 amd64 [upgradable from: 231-1]

With these packages installed, I have:

* Screen lock/dpms is broken

* A lot of startup programs don't run (weather indicator, nm-applet,
tomboy notes, system load indicator, for instance)

* I get a black screen background at startup (until I run nautilus
manually).

** Package changed: gnome-screensaver (Ubuntu) => systemd (Ubuntu)

** Summary changed:

- screen lock and dpms broken in yakkety
+ systemd update breaks screen lock, dpms, startup programs

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https://bugs.launchpad.net/bugs/1615184

Title:
  systemd update breaks screen lock, dpms, startup programs

Status in systemd package in Ubuntu:
  New

Bug description:
  This morning's updates broke both the screen lock (it never auto-locks
  now) and dpms (if you manually lock the screen, it doesn't turn off
  any more).

  "xset dpms force off" still works to turn the screen off and "gnome-
  screensaver-command -l" still locks the screen, so it probably isn't
  gnome-screensaver's fault.

  Is it a lightdm issue perhaps? Which app is in charge of this?

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: gnome-screensaver 3.6.1-7ubuntu4
  ProcVersionSignature: Ubuntu 4.4.0-9134.53-generic 4.4.15
  Uname: Linux 4.4.0-9134-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Aug 20 12:22:54 2016
  GnomeSessionIdleInhibited: Unknown
  GnomeSessionInhibitors: Failed to acquire
  GsettingsGnomeSession:
   org.gnome.desktop.session session-name 'ubuntu'
   org.gnome.desktop.session idle-delay uint32 60
  InstallationDate: Installed on 2016-07-04 (46 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  SourcePackage: gnome-screensaver
  UpgradeStatus: Upgraded to yakkety on 2016-07-24 (26 days ago)

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