Ubuntu
linux package

  1. Bug #1568573
  2. Comment #4

Comment 4 for bug 1568573

Revision history for this message
Pontus Pihlgren (pontus-pihlgren) wrote : Re: i915 Skylake - Ultra Dock external displays not detected after suspend/resume cycle

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.._