[Bug 108687] New: ThinkPad T450 - Broadwell-U: [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108687

            Bug ID: 108687
           Summary: ThinkPad T450 - Broadwell-U:
                    [drm:intel_dp_start_link_train [i915]] *ERROR* failed
                    to enable link training
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: diego.viola at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

I've got this error yesterday after plugging a Dell monitor on my T450 through
DisplayPort.

I am not sure if the error happened right after plugging it or a few seconds
later.

The error does not seem to occur every time I light up the display, only
sometimes.

I tried to reproduce it again and I cannot reproduce it. The display otherwise
works normally and I get no freezes/hangs.

I'm on Arch Linux, Linux kernel 4.18.16-arch1-1-ARCH, using modesetting drivers
and i3-wm.

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