Hey Atri, Good point. Yes, I had 4: * Clipboard indicator * Dash to panel * kstatusnotifieritem/appindicator support * System monitor I just disabled them all. It looks much more stable. I am going to re-enable them 1 by 1 to see. Also -- and for the purpose of helping debugging this -- any idea why systemd-coredump is not taking gnome-shell dump? (Any good pointers appreciated.. found a few, but I still couldn't make it take a dump for this big process) Jul 27 10:34:01 gimli systemd-coredump[11202]: Resource limits disable core dumping for process 6651 (gnome-shell). The process is less than 3G, so I up'ed /etc/systemd/coredump.conf such as: [Coredump] Storage=external Compress=yes ProcessSizeMax=4G ExternalSizeMax=4G JournalSizeMax=767M #MaxUse= #KeepFree= It does work for some other processes: $ coredumpctl list [...] Mon 2017-06-19 22:39:08 CEST 8830 1000 100 6 missing /usr/bin/kglobalaccel5 Sat 2017-06-24 12:55:47 CEST 15789 1000 100 6 missing /usr/lib/evolution-data-server/evolution-calendar-factory-subprocess Thu 2017-07-06 00:23:22 CEST 2029 1000 100 5 missing /usr/lib/evolution/evolution-alarm-notify Thu 2017-07-06 00:23:25 CEST 26310 1000 100 11 missing /opt/google/chrome/chrome Thu 2017-07-13 19:23:06 CEST 31693 1000 100 11 missing /usr/bin/kdenlive [...] Thanks all for the help. Cheers, fred