I had installed OpenBSD 6.1 on a Dell Latitude E7470 laptop (amd64,
Skylake architecture).  It could work on it but there were some
shortcomings (video was slow).

Today I upgraded to the latest snapshot, and I have rebooted
successfully, once, after which I updated packages.  When I boot up the
system now, it gets stuck at the kernel messages, the last three lines
being (typing it over):

vmm0 at mainbus0: VMX/EPI
error: [drm:pid96670:intel_dp_link_training_clock_recovery] *ERROR* too many 
full retries, give up error:
[drm:pid96670:intel_dp_set_idle_link_train] *ERROR* Timed out waiting for DP 
idle patterns

I do not remember what I have done to break the system.  There are
several reasons why I think it is my fault, and not a bug:

1. I have booted once successfully in the system (and everything worked
2. it happens also for the old kernel (obsd) (and also bsd.sp).

A package upgrade cannot break the system to this extend.  What could
it be then?

It would be difficult to include dmesg etc., because the system doesn't
boot up.

- Marco

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