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

[Martin Pitt]

> I also see the following in dmesg coinciding with the upgrade,

I think that's just the result of NM shutting down the network.  Do you
still have the corresponding NetworkManager logs in /var/log/syslog from
that time? It usually says why it shut down the net.

> That's precisely the time that the systemd packages were being
configured (udev, libsystemd-daemon0, systemd-shim, systemd-services)

Ah nice, that's very helpful to  narrow it down indeed. So the current
hypothesis is that reinstalling those causes either logind itself to get
restarted (which is not intended), or restarting the shim causes some
confusion with signals which does that. Can you reproduce this effect by
reinstalling udev systemd-shim systemd-services a few times? If so, then
the next step would be to enable system D-BUS debugging
(https://wiki.ubuntu.com/DebuggingDBus) and let dbus-monitor --system
run during the upgrade, to watch the bus traffic and pick up
signals/method calls which lead to that.

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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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