[Bug 61152] New: Ubuntu12.04.2 Haswell linear framebuffer support under extended mode broken by intel_gen4_compute_offset_xtiled()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61152

          Priority: medium
            Bug ID: 61152
          Assignee: chris at chris-wilson.co.uk
           Summary: Ubuntu12.04.2 Haswell linear framebuffer support under
                    extended mode broken by
                    intel_gen4_compute_offset_xtiled()
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: blocker
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kevinliuwt at yahoo.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 75152
  --> https://bugs.freedesktop.org/attachment.cgi?id=75152&action=edit
corruption shows on the secondary monitor

Steps to reproduce:
1. Ubuntu12.04.2 image(getting it from Canonical side), with i915_hsw to
support intel haswell asic
2. Connect the second monitor and desktop would configured into extended mode,
screen corruption will appear shown as the attached picture.

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