Dell Latitude and E-Port II: system hangs

Hello—

I have a Dell Latitude E7470 with the latest OpenBSD snapshot. It
boots fine when not connected to a docking station. When I connect it
to a DELL E-Port II (Model No: PR03X) docking station, it crashes with
the following kernel error:

error: [drm:pid8048:i915_gem_init_hw] *ERROR* Failed to initialize GuC, error -9 (ignored)
error: [drm:pid73911:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up
error: [drm:pid73911:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout (has irq: 1)!
error: [drm:pid73911:intel_dp_set_idle_link_train] *ERROR* Timed out waiting for DP idle patterns

Is this an issue with the docking station, the laptop or OpenBSD? Does
someone have an idea how this issue can be solved?


$ uname -a
OpenBSD ultron.hulten.org 6.3 GENERIC.MP#45 amd64

—Marco