I have the same problem on my Levnovo T460s. The same device worked with Ubuntu 15.10.
It is not always freezing, when I connect the HDMI, but approx. in 50% of the cases. If I can help anything to support the analysis, let me know. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1562076 Title: Ubuntu freezes a few seconds after plugin a screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1562076/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
