I see the same error message when either docking my laptop or attaching a monitor to a displayport on the dock. There are some differences. I use a Dell Latitude E7470 and a Dell dock (will have to look up the model). After the messaged shown in this bug my kernel freezes. If you think these differences warrants a separate bug, please let me know.
Here is someone else that is affected: https://ulikoenig.de/skylake- unter-linux-zum-laufen-kriegen-am-beispiel-eines-dell-latitude-e7270/ Here is my complete error message, I hade to transcribe it from a photo, the kernel freezes completely and doesn't reboot: [drm:intel_dp_start_link_train [i915]] *ERROR* too many voltage retries, give up [drm:indel_dp_complete_link_train [i915]] *ERROR* Timed out waiting for DP idle patterns Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler Shutting down cpus with NMI Kernel Offset: disabled drm_kms_helper: panic_occurred, switching back to text console Rebooting in 30 seconds.._ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1568573 Title: i915 Skylake - Ultra Dock external displays not detected after suspend/resume cycle To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568573/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
