Same behavior here. Middle Mouse Button (button2) not working, starting xev | grep button
try it multiple times; button event occurs; stop xev and the button keeps working.\ Environment: KDE Neon (based on Ubuntu 18.04) with mainline kernel verion 5.1.2-050102-generic Hardware: Logitech USB-PS/2 Optical Mouse connected to a Lenovo Yoga X380 via Thunderbolt 3 Dock -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1581088 Title: Middle mouse (wheel-click) button stopped working after upgrade to 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1581088/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs