Thanks for clarifying that. So the list of potential causes then isn't very big:
http://people.canonical.com/~lzemczak/landing-team/ota/ota-14.commitlog -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1649077 Title: OSK appears blank in the lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1649077/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs