[Bug 110838] New: Black screen at desktop on kernel for ICL only

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110838

            Bug ID: 110838
           Summary: Black screen at desktop on kernel for ICL only
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Keywords: regression
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: felix.j.degrood at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Recent 5.2 kernels showing black screen after logging into ICL machine. 
Tracked regression using drm-tip packages to sometime between 5-26 and 5-28
builds.  All kernels booting on my KBL.

  GOOD: https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2019-05-24
  GOOD: https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2019-05-26
    *regression*
  BAD: https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2019-05-28

Not sure how to bisect commits from here and find commit that regressed kernel
on ICL.  If there is a straight-forward process to do this, please send me
instructions.

march: x86_64
HW: ICL D2
Display: DP

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