This is probably due to gnome-session (mis-)behaviour: My test client gets a "Die" message from the xsm server and within a few tens of milliseconds receives an ICE io error (as the server has quit or broken the connection). According to https://www.x.org/releases/X11R7.7/doc/libSM/SMlib.html#Sending_a_Die_Message the server should wait for clients to close the connection.
gnome-session-bin/yakkety,now 3.20.2-1ubuntu7 amd64 [installed,automatic] gnome-session-canberra/yakkety,now 0.30-3ubuntu1 amd64 [installed,automatic] gnome-session-common/yakkety,yakkety,now 3.20.2-1ubuntu7 all [installed,automatic] ** Also affects: gnome-session (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1662281 Title: Firefox shows post-crash page after reboot or logoff To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1662281/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs