[Bug 59431] New: imac 12, 1 i915 crash when using x86 kernel with efi cross

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59431

          Priority: medium
            Bug ID: 59431
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: imac 12,1 i915 crash when using x86 kernel with efi
                    cross
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kc at cobradevil.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 73107
  --> https://bugs.freedesktop.org/attachment.cgi?id=73107&action=edit
kernel error message

Hi,

i have been waiting a while for new kernels to come up and see if this problem
got fixed, but that has not happened yet.

I'm trying to boot an x86 kernel with a 64 bit efi firmware using grub. This is
supported since kernel 3.4 but i cannot start the imac without disabling the
i915 driver. I can start the system with i915.disable=1 but without this option
it gives me the attached kernel message (picture).

When using the same kernel version but 64 bit, the system boots without
problems.

I'm not sure how I should report this bug so if more information is needed, I'm
happy to give that.
I have tested this with an ubuntu install using kernel version 3.5.0 till the
latest kernel 3.8 rc3.

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