I have the same issue on Ubuntu 16.04 4.4.0-34-generic and Lenovo x260 If it was suspended with two screens, it would not wake up.
** Attachment added: "dmesg.log" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1581560/+attachment/4727743/+files/dmesg.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1581560 Title: system crash when attaching external display To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1581560/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs