[Bug 100727] New: [skl] [drm] BUG: unable to handle kernel NULL pointer dereference at (null) [drm_kms_helper]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100727

            Bug ID: 100727
           Summary: [skl] [drm] BUG: unable to handle kernel NULL pointer
                    dereference at (null)  [drm_kms_helper]
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: kang at insecure.ws
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 130927
  --> https://bugs.freedesktop.org/attachment.cgi?id=130927&action=edit
i915_display_info with dock connected

-- Reboot --
Apr 19 13:08:31 xps13 kernel: IP: drm_dp_get_mst_branch_device+0xa2/0x110
[drm_kms_helper]
Apr 19 13:08:31 xps13 kernel: BUG: unable to handle kernel NULL pointer
dereference at           (null)


Sadly that is all I have as it freezes here - took a few tries to get any data
written to log before reboot. This happens when re-connecting a USB-C display
on a dock that has multiple video inputs (only one screen connected in addition
to laptop screen though).

Hardware: Dell XPS14 9350 / i915 / i7-6560U
Kernel tested: 4.10.10 and 4.11rc7
xorg-server: 1.19.3-2
xf86-video-intel: 1:2.99.917+770+gcb6ba2da-1 (git snap)

Will try to gather more data when it occurs - tips welcome though

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170419/30985ab2/attachment-0001.html>