[Bug 76711] New: [BDW Regression] blank screen on eDP with 38aecea0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76711

          Priority: medium
            Bug ID: 76711
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW Regression] blank screen on eDP with 38aecea0
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jljusten at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: DRI CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 96497
  --> https://bugs.freedesktop.org/attachment.cgi?id=96497&action=edit
38aecea0~ + modprobe.blacklist=i915

38aecea0ccbb909d635619cba22f1891e589b434
causes the eDP panel on my BDW system to only
show a blank screen.

I collected intel_reg_dumper output for three cases:

not-loaded is 38aecea0~ + modprobe.blacklist=i915
fast-mode is bwidawsk/broadwell
wide-mode is 38aecea0~

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