Since the bug was filed for 15.04, whereas I reported it for 15.10, I have to add that it was present for me on 15.04 as well. Only I cannot confirm whether switching to DVI helps.
Also, concerning the fact that I don't get log in screen - it seems to be the same for the original reporter. He manually kills user processes from a virtual console to get back a login screen. And, if that's important, my display is Dell UltraSharp 2408WFP. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs