I have a recently set up SL 7.2 using Gnome. Something very strange happened while trying to use the mouse and now only root can log in and get a sensible screen. All other users, including newly-created ones, just get a dark screen and a restart. Here's the output from abrt-cli.
id d58baaa96d91911e676a06016b2268842404bb1f reason: gnome-shell killed by SIGSEGV time: Tue 11 Oct 2016 16:25:28 BST cmdline: /usr/bin/gnome-shell package: gnome-shell-3.14.4-37.el7 uid: 191 (mm) count: 1 Directory: /var/spool/abrt/ccpp-2016-10-11-16:25:28-27878 id 31c6e963eb58a065c6f0bd5026c8bcae29cc71cb reason: gnome-clocks killed by SIGSEGV time: Tue 11 Oct 2016 16:20:23 BST cmdline: /usr/bin/gnome-clocks --gapplication-service package: gnome-clocks-3.14.1-1.el7 uid: 191 (mm) count: 1 Directory: /var/spool/abrt/ccpp-2016-10-11-16:20:23-15321 Please tell me how to fix this problem! Malcolm