https://bugs.freedesktop.org/show_bug.cgi?id=100685

            Bug ID: 100685
           Summary: [bisected] X Won't Start on Skylake/Tonga
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: General
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mike@fireburn.co.uk

Created attachment 130844
  --> https://bugs.freedesktop.org/attachment.cgi?id=130844&action=edit
dmesg

Bisected to:

commit b95ff0319a829d5e707d64a3994c75f012f6b6ec
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon Apr 3 10:32:51 2017 +0200

    drm: Remove drm_modeset_(un)lock_crtc

    The last user, the cursor ioctl, can just open-code this too. We
    simply have to move the acquire ctx dance from the universal function
    up into the top-level ioctl handler.

    Reviewed-by: Harry Wentland <harry.wentland@amd.com>
    Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
    Link:
http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-3-daniel.vetter@ffwll.ch

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