[Bug 73027] New: [ILK Regression]igt/kms_flip/flip-vs-panning fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73027

          Priority: high
            Bug ID: 73027
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK Regression]igt/kms_flip/flip-vs-panning fails
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 91185
  --> https://bugs.freedesktop.org/attachment.cgi?id=91185&action=edit
dmesg

System Environment:
--------------------------
Platform: Ironlake
Kernel: (drm-intel-fixes)a885b3ccc74d8e38074e1c43a47c354c5ea0b01e

Bug detailed description:
-------------------------
It fails on Ironlake with -fixes kernel. It works well on -nightly branch.
Fellowing cases also fail:
igt/kms_flip/flip-vs-panning-interruptible
igt/kms_flip/rcs-wf_vblank-vs-modeset

The latest known good commit:acc240d41ea1ab9c488a79219fb313b5b46265ae
The latest known bad commit: a885b3ccc74d8e38074e1c43a47c354c5ea0b01e

output:
IGT-Version: 1.5-g4f28614 (i686) (Linux:
3.13.0-rc3_drm-intel-fixes_a885b3_20131224+ i686)
Using monotonic timestamps
Beginning flip-vs-panning on crtc 3, connector 10
  1366x768 60 1366 1398 1422 1426 768 771 775 806 0x9 0x48 69000
.....unexpected flip seq 27465, should be >= 27466
Subtest flip-vs-panning: FAIL

Reproduce steps:
----------------
1. ./kms_flip --run-subtest flip-vs-panning

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