@Francis: This is another bug and you should open another bug report for that one.
That being said, I think I haven't seen that one using the Wily kernel (yet). But I have seen one, that is probably the same bug, using newer kernels (4.4/4.5). I have reported the bug against the 4.5.0 kernel on freedesktop.org. In my case the 4.5.0 kernel also crashed in drm_dp_payload_send_msg, but got there via the intel_mst_post_disable_dp call, instead of intel_mst_enable_dp call like in your case, but I think both crashes probably have the same root cause. I have reported it here: https://bugs.freedesktop.org/show_bug.cgi?id=94534 One of the developers, Chris Wilson, raised the bug priority to highest/blocker, so I hope this will get fixed soon, but there are no patches to test yet. ** Bug watch added: freedesktop.org Bugzilla #94534 https://bugs.freedesktop.org/show_bug.cgi?id=94534 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1540953 Title: Xorg crashed when undocking Lenovo T450s from docking station To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1540953/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs