Comment 4 for bug 1509729

I have resolved my issue: I had added a file /etc/ld.so.conf.d/LD_LIBRARY_PATH.conf containing the line /usr/lib/vmware/lib/libglibmm-2.4.so.1

The purpose of this file was to force loading of a vmware library: This library apparently interferes with the operation of Ubuntu in several instances.