[Bug 82439] New: Dell Latitude 6430u failed to boot without nomodeset - since 3.16-rc5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82439

          Priority: medium
            Bug ID: 82439
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Dell Latitude 6430u failed to boot without nomodeset -
                    since 3.16-rc5
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: lv.zheng at intel.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 104398
  --> https://bugs.freedesktop.org/attachment.cgi?id=104398&action=edit
The Kconfig generation for 3.16-rc4.

I found i915 broken on Dell Latitude 6430u since 3.16-rc5:
Without nomodeset, the kernel hangs during the boot, it can boot with
nomodeset.
There should be one commit between 3.16-rc4 and 3.16-rc5 caused this issue.

Same Kconfig can successfully boot the 3.16-rc4 kernel.

The Kconfig generation for 3.16-rc4 is attached.

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