[Bug 114601] New: Kernel 4.5.0 crashes when docking Lenovo T450s (with external monitor connected)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=114601

            Bug ID: 114601
           Summary: Kernel 4.5.0 crashes when docking Lenovo T450s (with
                    external monitor connected)
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.5.0
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: cs_gon at yahoo.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 209111
  --> https://bugzilla.kernel.org/attachment.cgi?id=209111&action=edit
dmesg output with drm.debug=0x1e

When docking the T450s into the docking station (Lenovo Pro Dock) with an
external monitor connected, the kernel frequently crashes.

I have enabled kernel crash dumps and drm.debug=0x1e, and at least got the
dmesg output. But I currently don't have the debugging symbols (the kernel is
from the Ubuntu mainline PPA), so cannot provide a full backtrace at the
moment.

Please let me know if this is needed. And is compiling with CONFIG_DEBUG_INFO=y
enough, or are additional steps needed?

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