[Bug 83645] New: [ILK/SNB Bisected]igt/kms_flip/flip-vs-expired-vblank-interruptible fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83645

          Priority: high
            Bug ID: 83645
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK/SNB
                    Bisected]igt/kms_flip/flip-vs-expired-vblank-interrupt
                    ible fails
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105947
  --> https://bugs.freedesktop.org/attachment.cgi?id=105947&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes.
Bisected

Non-working platforms: ILK SNB

==kernel==
--------------------------
origin/drm-intel-nightly: 4a3d32734bdcef6813b31f06a58430436e98711e(fails)
    drm-intel-nightly: 2014y-09m-08d-18h-33m-01s integration manifest
origin/drm-intel-next-queued: 9c787942907face82da505c2c5493998b56cfc5a(works)
    drm/i915: Decouple the stuck pageflip on modeset
origin/drm-intel-fixes: 25fc92b99f65bec7d7c747c0305f048d7b19cc44(works)
    drm/i915: Fix EIO/wedged handling in gem fault handler

==Bug detailed description==
-----------------------------
igt/kms_flip/flip-vs-expired-vblank-interruptible fails

Output:
[root at x-sgb4 tests]# ./kms_flip --run-subtest
flip-vs-expired-vblank-interruptible
IGT-Version: 1.7-ga16ebcc (i686) (Linux:
3.17.0-rc4_drm-intel-nightly_4a3d32_20140909+ i686)
Using monotonic timestamps
Beginning flip-vs-expired-vblank-interruptible on crtc 8, connector 14
  1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500
.Test assertion failure function run_test_step, file kms_flip.c:838:
Failed assertion: timercmp(&reply.ts, &o->flip_state.last_ts, ==)
Last errno: 4, Interrupted system call
Subtest flip-vs-expired-vblank-interruptible: FAIL

==Reproduce steps==
---------------------------- 
1. ./kms_flip --run-subtest flip-vs-expired-vblank-interruptible

==Bisect results==
----------------------------
Bisect shows: f62a4a39d0730b1739c552edcf8179bf9b964b50 is the first bad commit
commit f62a4a39d0730b1739c552edcf8179bf9b964b50
Merge: 14470a1 80b36f4
Author:     Daniel Vetter <daniel.vetter at ffwll.ch>
AuthorDate: Thu Aug 28 18:02:58 2014 +0200
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Thu Aug 28 18:02:58 2014 +0200

    Merge remote-tracking branch 'origin/topic/vblank-rework' into
drm-intel-nightly

    Conflicts:
        drivers/gpu/drm/drm_irq.c

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