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[Damian Yerrick <ubuntu@xxxxxxxxxxxx>]

It's still happening in 14.04 LTS (Trusty) on my Dell Inspiron mini 1012
laptop, usually after a fairly long use session. But it always starts
working again after either another suspend/resume cycle or restarting
Network Manager.

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https://bugs.launchpad.net/bugs/524454

Title:
  Networking is disabled on boot (usually after suspend/hibernate)

Status in NetworkManager:
  Fix Released
Status in network-manager package in Ubuntu:
  Fix Released
Status in network-manager source package in Lucid:
  Won't Fix
Status in network-manager source package in Maverick:
  Fix Released
Status in network-manager package in Debian:
  Fix Released

Bug description:
  Binary package hint: network-manager

  My networking is disabled every time I boot. To correct, I must right-
  click on Network Manager applet and choose "Enable Networking," after
  which my wireless networks become available and I can get online.

  I'm using Lucid on a MacBookPro2,1

  ------SRU details----
  Impact: This bug keeps the the networking disabled after a resume from suspend/hibernate. Right-clicking on the Network Manager applet and choosing "Enable Networking" solves the problem.

  How the bug has been addressed: NM 0.8 has some bugs witch are
  partially listed at
  http://live.gnome.org/NetworkManager/ReleaseProcess The upstream has
  provided two patches (both are attached to this bug). There are two
  patches because the person who did the fix forgot something from the
  first commit and therefore made a second commit. The links to commits
  and patches can be found at comments 59 and 61. Some of these bugs
  including this bug are fixed in NM 0.8.1

  TEST CASE:
  Suspend or hibernate. The upstream report isn't very detailed about this, but in my case that process is unsuccessful. On resume you should not have a working network.

  To solve:
   1) run
  service network-manager stop
  rm /var/lib/NetworkManager/NetworkManager.state
  service network-manager start

  or 2) right-click on Network Manager applet and choose "Enable
  Networking,"

  or 3) Reboot.

  Regression potential: Really none. This bug is a regression in the new
  NM 0.8. The upstream has fixed this bug and some other bugs in NM
  0.8.1.

  ------------------------
  ProblemType: Bug
  Architecture: i386
  CRDA: Error: [Errno 2] No such file or directory
  Date: Fri Feb 19 14:25:27 2010
  DistroRelease: Ubuntu 10.04
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  IpRoute:
   10.45.43.0/24 dev wlan0  proto kernel  scope link  src 10.45.43.23  metric 2
   169.254.0.0/16 dev wlan0  scope link  metric 1000
   default via 10.45.43.1 dev wlan0  proto static
  Keyfiles: Error: [Errno 2] No such file or directory
  Package: network-manager 0.8~rc2-0ubuntu1
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-13.18-generic
  SourcePackage: network-manager
  Uname: Linux 2.6.32-13-generic i686

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