[Bug 96569] system freezes during boot, [drm:intel_dp_start_link_train [i915]] and [drm:intel_psr_work [i915]] ERROR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96569

--- Comment #4 from Ander Conselvan de Oliveira <conselvan2 at gmail.com> ---
(In reply to Robin Krahl from comment #3)
> (In reply to Ander Conselvan de Oliveira from comment #2)
> > Created attachment 125056 [details] [review] [review]
> > Workaround: don't retrain the link from long pulse
> > 
> > […]
> > 
> > I'm not sure what the proper fix would be, but the attached patch would
> > confirm that's the issue.
> 
> Thanks!  Unfortunately the patch (applied against v4.7-rc1) does not solve
> the problem in the original setup.
> 
> But I found out by accident that apparently the system does not actually
> freeze, it’s just the internal monitor that is not updated.  If I connect an
> external monitor, I can login and work (though the tty is flooded with the
> time out errors).
> 
> Should I provide logs from the patched kernel, or test whether the external
> monitor also works with the unpatched kernel?

Please provide the logs for the patched kernel. There were two different error
messages in the log, and the patch would fix the first one: "*ERROR* failed to
train DP, aborting". This may or may not be related to the second error message
and the frozen screen.

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