There is nothing in /var/crash at the date of the crash nor about lightdm. I don't know if this directory is periodically purged, but as I remember, no file was produced.
I will not be able to reproduce the problem before end of august as all users are in summer holidays. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to glib-networking in Ubuntu. https://bugs.launchpad.net/bugs/1890047 Title: Sessions crash, all X11 remote users disconnected Status in glib-networking package in Ubuntu: New Bug description: Hello, I have a Ubuntu 16.04.6 LTS (Xenial Xerus) used by many X11 remote user. When upgrading to glib-networking, glib-networking-common and lib- networking-services to 2.48.2-1~ubuntu16.04.2; all sessions crash randomly at the same time many times a day. When it happens, all users are disconnected and it looks like lightdm is restarted. Downgrading to 2.48.2-1~ubuntu16.04.1 resolve the problem. X11 terminals were not upgraded. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glib-networking/+bug/1890047/+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
