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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks2/+bug/1508075/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
