I upgraded to 17.10 last night. Upon reboot, I noticed I couldn't launch gnome-terminal. This morning, I noticed I couldn't open any folders on the Desktop and many applications, whether from the desktop, or my favorites, or the command line. Examples: LibreOffice, evince, gedit. Applications that do work include Firefox and Emacs.
Here is what happens when I try to run Nautilus and evince from the console (Terminology):
rwhe@duell3:~$ nautilus sys:1: PyGIWarning: Nautilus was imported without specifying a version first. Use gi.require_version('Nautilus', '3.0') before import to ensure that the right version gets loaded. Initializing nautilus-dropbox 2015.10.28 Segmentation fault (core dumped) rwhe@duell3:~$ evince Segmentation fault (core dumped) rwhe@duell3:~$
I've already googled the
gi.require_version warning and a number of other related topics and followed the advice that worked for other people, with no results, so please don't mark this as a duplicate.
The only change I've made to my system since the upgrade is uninstalling the last vestiges of Ubuntu Mate, and then reinstalling them in the hope of fixing my issue. Again, no visible, relevant results.
Thanks for your time and expertise.