I had a similar behavior when I changed my HDD and installed a fast SSD for Xubuntu 16.04. I can use buttons, and dropdowns with no issues. It happens with unity and webkit greeters. Seems you need to wait at least 10-15 seconds before all the services are effectively up and running. Nothing suspicious on logs.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1495332 Title: 15.10: No keyboard input on startup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1495332/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
