Thanks for your reply Daniel. It's now looking as if the problems with the dash are a symptom of a crash rather than a cause. After rebooting and disabling all extensions I can restart gnome-shell with 'Alt F2 > r and enter' several times with a problem.
After starting some applications gnome-shell won't restart without crashing and sending me back to the log in screen. Step 1 didn't lead to a new bug report being created. Step 2 didn't show anything recent Step 3 produced the following link: https://errors.ubuntu.com/oops/1edb338e-d831-11e8-923b-fa163e102db1 but step 1 failed again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799787 Title: Dash to Dock behaves strangely then gnome-shell crashes when forcing a restart To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1799787/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs