I understood the problem : If we install "dashtodock" from "gnome software" (with the source: extension.gnome.org), it works without problem.
The bug is present only if you install dashtodock in command line with the package in the repositories : sudo apt install gnome-shell- extension-dashtodock so it's finally not very serious, you just have to use the right method to install dashtodock, only some advanced user who uses the command line could get caught. ** Changed in: gnome-shell-extension-ubuntu-dock (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1720547 Title: 2 bugs with Dash To dock : no setting + crash if button activated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1720547/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs