It happened just after reboot, so the new log is relatively short. To make monitors work again I had to replug dock-station.
** Attachment added: "log1.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2067143/+attachment/5791371/+files/log1.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2067143 Title: [i915] ‘no signal’ after monitor sleep or monitor turned off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2067143/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs