[Bug 1288411] Re: udev restart on upgrade broke my wireless state

[Martin Pitt]

Indeed the "[ ] Enable network" menu entry isn't rfkill, sorry. That's
"[ ] Enable wireless network". I think "Enable network" just pokes
org.freedesktop.NetworkManager.Enable(False/True), which tells NM to
shut down/restart all interfaces. Aside from this manual operation the
main automatic thing to indirectly call this that I know of is logind:
it sends a PrepareForSleep(True) signal right before suspend, and a
PrepareForSleep(False) signal after resuming; NM listens to that signal
and then does the equivalent of Enable(False/True), to restart the
network after resuming.

Now, suspend certainly wasn't involved here either, but during your
upgrade systemd-services/libpam-systemd were upgraded as well. Their
maint scripts don't do anything to manually restart them, but perhaps
logind wasn't running before the upgrade and starting it had such a
funky effect? Do you have any /var/crash/* which could be related?

And then, it might be possible that other packages restarted something
which triggered some network change (libvirt?). But I've never seen this
effect myself, so it's hard to guess. Can you trigger this again by apt-
get install --reinstall'ing everything that got upgraded in that batch?

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https://bugs.launchpad.net/bugs/1288411

Title:
  udev restart on upgrade broke my wireless state

Status in “systemd” package in Ubuntu:
  Incomplete

Bug description:
  Upgrading on trusty today, my wireless connection suddenly cut out,
  with network-manager reporting that "wireless is disabled".  Looking
  at the logs, I see that udev was upgraded, and that as part of that
  upgrade udev was restarted.  I had to toggle the wireless switch on my
  laptop off and on again to get the wireless to come back.

  I don't know why udev is being restarted on upgrade in Ubuntu - this
  is a delta from the Debian package, where udev is never restarted.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: udev 204-5ubuntu13
  ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
  Uname: Linux 3.13.0-12-generic x86_64
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
  CurrentDesktop: Unity
  CustomUdevRuleFiles: 70-ssd-scheduler.rules 70-kvm-perms.rules
  Date: Wed Mar  5 12:43:35 2014
  InstallationDate: Installed on 2010-09-24 (1258 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MachineType: LENOVO 2306CTO
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-12-generic root=UUID=362a1cf5-63b7-4122-8457-33ca1d10a8ad ro quiet splash
  SourcePackage: systemd
  UpgradeStatus: Upgraded to trusty on 2013-10-23 (133 days ago)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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