Current xenial linux-image-4.4.0-62-generic remains broken, with dmesg WARNs on CRTC clocks and then system hangs when switching user sessions (which invokes some gnome-session xrandr setup). Lost the exact dmesg on the system hang.
Current mainline 4.8.x (4.8.17-040817-generic) continues to behave nicely, although there's occasionally some delays when docking/undocking before the xrandr configuration updates. The 4.8 kernel is also included in the 16.04.02 HWE release, and a quick test with linux-image-4.8.0-36-generic seems to also behave reasonably well. I would tentatively consider this issue fixed in 16.04.02, although I still need to test with xserver-xorg-hwe-16.04. Will also test with the newest mainline 4.10 release when I have the chance. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1597267 Title: ThinkPad X260 connecting external DisplayPort hangs system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1597267/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs