[Bug 93719] New: [drm:intel_display_resume [i915]] *ERROR* Restoring old state failed with -22

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93719

            Bug ID: 93719
           Summary: [drm:intel_display_resume [i915]] *ERROR* Restoring
                    old state failed with -22
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: an.inbox at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121048
  --> https://bugs.freedesktop.org/attachment.cgi?id=121048&action=edit
dmesg log covering boot/suspend/resume with drm.debug=0x04

Resume from suspend fails, systematic over 5 tests. The screen stays black, VT
switching doesn't work. The machine is still functional and can be accessed
with SSH, dmesg log covering a boot/suspend/resume cycle with drm.debug=0x04 is
attached.

Intel DRM nightly kernel 4.4.0:
  commit fdbeff6c26904cedc81e0b3383d3174802230a60
  2016y-01m-12d-18h-13m-13s UTC integration manifest

PC is a Thinkpad X1 3rd gen, i5-5200U, 2560x1440 internal screen. No peripheral
attached, this happens only with the internal display.

This is somewhat related to bug #91585: once this bug is fixed, I'll be able to
check whether Intel kernel 4.4.0 fixes #91585 or not.

Thanks

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