Looking at the stacktrace, the assertion error happens inside dbus-cpp worker thread that has called core::dbus::Bus::run().
Some quick googling: http://stackoverflow.com/questions/1105745/pthread-mutex-assertion-error ** Also affects: dbus-cpp Importance: Undecided Status: New ** Changed in: dbus-cpp Status: New => Confirmed ** Also affects: dbus-cpp (Ubuntu) Importance: Undecided Status: New ** Also affects: dbus-cpp (Ubuntu RTM) Importance: Undecided Status: New ** Changed in: dbus-cpp (Ubuntu) Status: New => Confirmed ** Changed in: dbus-cpp (Ubuntu RTM) Status: New => Confirmed ** Changed in: dbus-cpp (Ubuntu) Importance: Undecided => Critical ** Changed in: dbus-cpp (Ubuntu RTM) Importance: Undecided => Critical ** Changed in: dbus-cpp (Ubuntu) Assignee: (unassigned) => Thomas Voß (thomas-voss) ** Changed in: dbus-cpp (Ubuntu RTM) Assignee: (unassigned) => Thomas Voß (thomas-voss) ** Changed in: indicator-network (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to dbus-cpp in Ubuntu. https://bugs.launchpad.net/bugs/1382595 Title: [TOPBLOCKER] /usr/lib/arm-linux-gnueabihf/indicator-network/indicator- network-service:indicator-network-service: pthread_mutex_lock.c:80: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed. Status in DBus C++: Confirmed Status in “dbus-cpp” package in Ubuntu: Confirmed Status in “indicator-network” package in Ubuntu: Invalid Status in “dbus-cpp” package in Ubuntu RTM: Confirmed Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding indicator-network. This problem was most recently seen with version 0.5.1+14.10.20141015-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/ecc14b5d54f3e0a0f1720cad0c623f81c8a16988 contains more details. steps to reproduce: (need to trigger race condition) 1. pull down network indicator 2. toggle flight mode on and off quickly a few times 3. click sim card 1 and 2 4. toggle flight mode 5. swipe up close indicators 6. repeat steps 1-5 until crash occurs expected results: no crash happens actual results: Bluetooth indicator blinks (appear and disappear) in indicator bar at top of screen, and network indicator crashes. additional info: eventually the bluetooth indicator appears stable in the indicators at the top of the screen. To manage notifications about this bug go to: https://bugs.launchpad.net/dbus-cpp/+bug/1382595/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp