Seth: I uploaded an SRU for this (needs to be reviewed/acked by SRU
team). the "session → system bus" fix is an obvious one and seems to
help you, so I'd be grateful if you could verify this.

@others: I know this is necessary but not sufficient, so I'll reopen
after this. I'm still waiting for a D-BUS debug log without TLP or other
non-standard facilities where this bug happens. Thanks!

** Description changed:

  As per request from bug #1184262, this is a new report, along with dbus
  (to be attached)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: systemd-services 204-0ubuntu19
  Uname: Linux 3.12.0-custom x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  Date: Sun Nov 17 20:24:41 2013
  MarkForUpload: True
  SourcePackage: systemd
  UpgradeStatus: Upgraded to saucy on 2013-10-17 (31 days ago)
+ 
+ SRU INFORMATION:
+ FIX: https://github.com/desrt/systemd-shim/commit/9e1ebe3ab
+ 
+ Regression potential: Low. Flushing the session bus was introduced in
+ version 4 and is obviously bogus as in a system D-BUS service there is
+ no session bus. This causes lots of confusing error messages and
+ unnecessary overhead like trying to start dbus-launch. Flushing the
+ system bus is low-risk, in most cases it's a no-op and it would
+ otherwise prevent losing signals after waking up. No known regressions.
+ 
+ TEST CASE: Run several suspend/resume cycles with the lid, session
+ indicator menu, and verify that the network comes back up. It is known
+ that this fix is necessary but not sufficient, so it is not expected to
+ fix all cases. But it should not make things worse, so if network now
+ does not come up any more on a machine where it previously worked this
+ would count as failure/regression.

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https://bugs.launchpad.net/bugs/1252121

Title:
  missing PrepareForSleep signal after resuming, causing networking to
  stay disabled

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