seems this has to do something with Unity and 3D acceleration. I can confirm this bug in Ubuntu 16.04.1 LTS (64-bit).
I can log in to Ubuntu 16.04.1 running x11vnc without 3D acceleration. How you can try this: 1) setup a virtual Ubuntu 16.04.1 in VirtualBox or VMWare (which one does not matter) 2) enable 3D acceleration for the guest Ubuntu and install x11vnc => you wont be able to log in after reboot or if lock-screen activates 3) disable 3D acceleration for the guest Ubuntu, it will use a fallback graphic mode. => now you are able to log in with vnc without problems -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1287171 Title: light-locker breaks x11vnc as service To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1287171/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
