I also can confirm that the only thing needed to reproduce this bug is, as chiron wrote, to lock the laptop and try to login, although it doesn't happen every time.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1621719 Title: Black screen when resuming laptop from sleep To manage notifications about this bug go to: https://bugs.launchpad.net/elementaryos/+bug/1621719/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
