[Bug 74103] New: [BDW/HSW/IVB Regression]Blackscreen and system hangs while booting

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74103

          Priority: medium
            Bug ID: 74103
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW/HSW/IVB Regression]Blackscreen and system hangs
                    while booting
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jinxianx.guo at intel.com
          Hardware: All
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Environment:
--------------------------
Kernel: drm-intel-nightly
commit 63618e87b05a1e73ce1d1a83f59f6fff6fc19be9
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Sun Jan 26 16:10:58 2014 +0100

    drm-intel-nightly: 2014y-01m-26d-16h-10m-49s integration manifest


Bug detailed description:
-----------------------------
Change the kernel and boot the system, black screen shows. And unable to
connect the device via ssh. The keyboard light is able to light up or light
off, but the system unable to response keyboard event.

We catched the boot log via serial port in attachment, for your reference.

It works well on -nightly(f27f16540be56813df2ebb8e1106dd5c258f07c3) yesterday

Steps:
---------------------------
Change to latest -nightly kernel and boot the system

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