@Daniel van Vugt: You were right; the problem appears to have been related to a shell extension, but not one of the extensions you suggested I uninstall. The cause seems to have been the "freon" extension (https://extensions.gnome.org/extension/841/freon/) which was installed but disabled. Since this extension was removed the problem has not recurred.
So this is not a Gnome3 bug and this entry can be closed as such. Thank you for your assistance!! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1830255 Title: Gnome shell freezes for about 1 minute after screen blanks. high disk usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1830255/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
