Copying the description from duplicate bug #1769540, since there is more information in that description. Also, note that this bug is present in 18.04 (as well as 17.10)...
If you touch an icon on the dock using a touch screen, the dock performs duplicate actions for a single touch event. 1. Touching the app-grid icon on the dock with your finger causes the "applications dash" to appear, and quickly disappear, as if you had left-clicked on the app-grid icon *twice* using a mouse button. 2. Touching any favorites icon on the dock with your finger causes the selected application to open *two* instances, as if you had left-clicked on the app-grid icon twice using a mouse button. THIS ONLY AFFECTS UBUNTU-DOCK ----------------------------- This only happens when using the touch screen to interact with the dock. Using a mouse or track-pad works as expected. The top-bar behaves as expected, as well, when using the touch screen. For example, touching the Activities label ovens the "dash overview" as expected; touching the notifications area on the top bar opens the notifications/calendar as expected; touching the indicator icons behave as expected as well. Interacting with open applications using the touch screen also works as expected. Applications respond to touch events as if a single event was generated. UBUNTU DOCK ----------- Only the ubuntu-dock acts as if it received two (or more) touch events for each single touch action. EXPECTED BEHAVIOR ----------------- Ubuntu dock should respond as if it received a single click event, for each single touch event. ADDITIONAL INFORMATION ---------------------- If I touch the "Action" item at the top left of the desk-top, the overview appears. THEN, if I touch an icon in the dock, it behaves correctly. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745888 Title: Two instances of a program launch whenever you touch a favorites icon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1745888/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
