[Bug 1615184] Re: systemd update breaks screen lock, dpms, startup programs

[Rocko]

Reading the associated Debian bug (http://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=834367), it's a different one from this bug. That
bugs refers to issues after running systemctl daemon-reexec (which
happens when systemd is upgraded) caused by keypresses being sent to a
tty console as well as to the X session, and the workaround is to
reboot. This bug occurs with the latest systemd installed even after a
reboot, and is not related to the systemd upgrade process.

I have certainly seen all those issues when systemd is upgraded (usually
one of my monitors turns off, even though it is set to be on; I have
seen the keypresses echoed to a tty console; I have had the system
reboot on CTRL-ALT-DEL even though I was in an X-session; and I have
seen it switch to tty consoles unexpectedly from an X-session).

So just to be clear: _this_ bug occurs after any number of reboots with
systemd 231-4 installed. It does not occur with systemd 231-1 installed.
It does not appear to be related to http://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=834367. (Really, I would not have reported a bug
if I knew there was an upgraded version of the relevant package
available.)

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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
Status in systemd package in Debian:
  Fix Released

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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