This patch solved this issue "Revert "drm/i915: try to train DP even harder" http://cgit.freedesktop.org/~danvet/drm-intel/commit/?id=3b4f819d5eac94ba8fe5e8c061f6dabfe8d7b22c
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1153627 Title: Kernel hangs while booting if there is a monitor connected to DP2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1153627/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs