[Bug 108266] New: Screen flashing and dmesg flooded with *ERROR* [CONNECTOR:65:eDP-1] Link Training failed at link rate = 270000, lane count = 2 when psr enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108266

            Bug ID: 108266
           Summary: Screen flashing and dmesg flooded with *ERROR*
                    [CONNECTOR:65:eDP-1] Link Training failed at link rate
                    = 270000, lane count = 2 when psr enabled
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: kitestramuort at autistici.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 141929
  --> https://bugs.freedesktop.org/attachment.cgi?id=141929&action=edit
dmesg output

If I enable psr with i915.enable_psr=1 the syslog is flooded by the message
below and the screen blanks intermittently for a second or so.

*ERROR* [CONNECTOR:65:eDP-1] Link Training failed at link rate = 270000, lane
count = 2

No such message is logged when psr is disabled and no flashing occurs.

This is on a Thinkpad T450s, Core i5-5300U, kernel 4.19.0-rc6, Arch Linux.

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