I have a similar bug using LibreOffice Write, which is now occurring regularly. In my case, the computer freezes and I have to hard-restart it. I am also using 16.04, on an iMac with a second monitor attached.
** Attachment added: "Syslog crash 15072016 16.05hr.txt" https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1596192/+attachment/4701979/+files/Syslog%20crash%2015072016%2016.05hr.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1596192 Title: ubuntu org.gnome.Nautilus[1336]: (soffice:3712): Gdk-WARNING **: gdk_window_set_icon_list: icons too large Status in libreoffice package in Ubuntu: New Bug description: get this logged into journalctl when using Calc: ubuntu org.gnome.Nautilus[1336]: ** (soffice:3712): WARNING **: Unknown event notification 37 ubuntu org.gnome.Nautilus[1336]: (soffice:3712): Gdk-WARNING **: gdk_window_set_icon_list: icons too large there is also : Unknown event notification 34 Unknown event notification 35 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: libreoffice-core 1:5.1.3-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-27.46-generic 4.4.13 Uname: Linux 4.4.0-27-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: GNOME Date: Sat Jun 25 15:56:36 2016 ExecutablePath: /usr/lib/libreoffice/program/soffice.bin SourcePackage: libreoffice UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1596192/+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
