Sounds like the Dock is losing its network connection (I'm assuming its wired to the NIC on the dock) When this issue occurs again, remove the network cable from the dock and try logging in. If it lets you in - The dock may be in some sort of power save mode stopping network connectivity.
for more information - https://lenovosupport.org/lenovo-support-number/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1727662 Title: [Lenovo ThinkPad T450s] Issues after docking and locking: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1727662/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
