[Bug 83094] New: [BDW Regression]System dmesg contains "ERROR" when machine resumes from s3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83094

          Priority: medium
            Bug ID: 83094
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW Regression]System dmesg contains "ERROR" when
                    machine resumes from s3
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lei.a.liu at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105274
  --> https://bugs.freedesktop.org/attachment.cgi?id=105274&action=edit
dmesg after s3

==System Environment==
--------------------------
Regression: Yes. 
Good commit: f4be89cecea437aaddd7700d05c6bdb5678041f7 (-fixes branch)
    drm/i915: Fix crash when failing to parse MIPI VBT
Non-working platforms: Broadwell


==kernel==
--------------------------
-nightly: d82af52b1766594ece621e427f1604194ca2b415 (failed)
-queued: 0f09bb2bf3d51a1e57e8dfc46e3c159170651c29 (failed)
    drm/i915/bdw: Make sure error capture keeps working with Execlists
-fixes: 1a125d8a2c22b11741fc47d4ffcf7a5ffa044dd3 (failed)
    drm/i915: don't try to retrain a DP link on an inactive CRTC

==Bug detailed description==
-----------------------------
System dmesg contains  "ERROR"(like below) when machine resumes from s3 .
<3>[   20.508358] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
dete

==Reproduce steps==
---------------------------- 
1. S3
2. check dmesg

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