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[Martin Pitt <martin.pitt@xxxxxxxxxx>]

Thanks Mathieu; all your traces indeed have

   +++ killed by SIGHUP +++

which is from /usr/lib/udisks2/udisks2-inhibit. This is a race
condition, when polkit gets killed at the wrong time while a request is
pending it would behave that way. Curious that this only surfaces right
now, /usr/lib/udisks2/udisks2-inhibit has been like that for a while
already.

All of your traces got interrupted in poll() though, i. e. there was no
pending request (no recv* yet), so this did not interrupt a pending
call. However, this is still bad.

Thing to try on a machine which reproduces this: Please comment out all
the code except the final "$@" from /usr/lib/udisks2/udisks2-inhibit
(from initramfs break=casper-bottom) and verify that this crash then
stops. Then, once you are in ubiquity, run "pkill -e --signal STOP gvfs-
udisks" to stop gvfs-udisks2-volume-monitor (but that does not apply to
all derivatives, such as KDE).

I'll think about how we can inhibit udisks without having to restart
polkit.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to policykit-1 in Ubuntu.
https://bugs.launchpad.net/bugs/1508075

Title:
  ubiquity and others time out on polkit (killed by udisks2-inhibit)

Status in udisks2 package in Ubuntu:
  Incomplete

Bug description:
  on wily release candidates I get a crash when it switches to the
  network setup page

  this doesn't happen with "try ubuntu" mode which runs as root only
  when launching ubiquity from the desktop

  the backtrace points to an authentication issue

  I get a related backtrace even if I'm connected to a network from the
  panel network-manager

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubiquity 2.21.35
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.365
  CurrentDesktop: Unity
  Date: Tue Oct 20 14:26:28 2015
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash ---
  LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151019)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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