[Bug 81367] New: [IVB/SNB Regression]igt/kms_flip some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81367

          Priority: high
            Bug ID: 81367
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB/SNB Regression]igt/kms_flip some subcases fail
        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 102811
  --> https://bugs.freedesktop.org/attachment.cgi?id=102811&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes
It's a igt regression issue
Good commit on igt: c5b9615b83910f5a5c19fc84d938ea643f4e3009
Bad commit on igt: 3f50598fb7399bafed01f7b44f4a4f5a85a9f13c

Non-working platforms: IVB SNB

==kernel==
--------------------------
origin/drm-intel-nightly: 16025dad8e9964a5810385f755d43f1c48d6fdcc(fails)
    drm-intel-nightly: 2014y-07m-09d-14h-17m-14s integration manifest
origin/drm-intel-next-queued: d101c8fe9bda6578ae72d6021415cfaad2b422f0(fails)
    drm/i915: remove i915_rstdby_delays debugfs entry
origin/drm-intel-fixes: 01527b3127997ef6370d5ad4fa25d96847fbf12a(fails)
    drm/i915/vlv: T12 eDP panel timing enforcement during reboot

==Bug detailed description==
igt/kms_flip some subcases fail

Case list:
igt/kms_flip/2x-absolute-wf_vblank
igt/kms_flip/2x-absolute-wf_vblank-interruptible
igt/kms_flip/2x-bcs-flip-vs-dpms
igt/kms_flip/2x-bcs-flip-vs-dpms-interruptible
igt/kms_flip/2x-bcs-flip-vs-modeset
igt/kms_flip/2x-bcs-flip-vs-modeset-interruptible
igt/kms_flip/2x-bcs-flip-vs-panning
igt/kms_flip/2x-bcs-flip-vs-panning-interruptible
igt/kms_flip/2x-bcs-wf_vblank-vs-dpms
igt/kms_flip/2x-bcs-wf_vblank-vs-dpms-interruptible
igt/kms_flip/2x-bcs-wf_vblank-vs-modeset
igt/kms_flip/2x-bcs-wf_vblank-vs-modeset-interruptible
igt/kms_flip/2x-blocking-absolute-wf_vblank
igt/kms_flip/2x-blocking-absolute-wf_vblank-interruptible
igt/kms_flip/2x-blocking-wf_vblank
igt/kms_flip/2x-busy-flip
igt/kms_flip/2x-busy-flip-interruptible
igt/kms_flip/2x-dpms-vs-vblank-race
igt/kms_flip/2x-dpms-vs-vblank-race-interruptible
igt/kms_flip/2x-flip-vs-absolute-wf_vblank
igt/kms_flip/2x-flip-vs-absolute-wf_vblank-interruptible
igt/kms_flip/2x-flip-vs-bad-tiling
igt/kms_flip/2x-flip-vs-bad-tiling-interruptible
igt/kms_flip/2x-flip-vs-blocking-wf-vblank
igt/kms_flip/2x-flip-vs-dpms
igt/kms_flip/2x-flip-vs-dpms-interruptible
igt/kms_flip/2x-flip-vs-dpms-off-vs-modeset
igt/kms_flip/2x-flip-vs-dpms-off-vs-modeset-interruptible
igt/kms_flip/2x-flip-vs-expired-vblank
igt/kms_flip/2x-flip-vs-expired-vblank-interruptible
igt/kms_flip/2x-flip-vs-fences
igt/kms_flip/2x-flip-vs-fences-interruptible
igt/kms_flip/2x-flip-vs-modeset
igt/kms_flip/2x-flip-vs-modeset-interruptible
igt/kms_flip/2x-flip-vs-modeset-vs-hang
igt/kms_flip/2x-flip-vs-modeset-vs-hang-interruptible
igt/kms_flip/2x-flip-vs-panning
igt/kms_flip/2x-flip-vs-panning-interruptible
igt/kms_flip/2x-flip-vs-panning-vs-hang
igt/kms_flip/2x-flip-vs-panning-vs-hang-interruptible
igt/kms_flip/2x-flip-vs-rmfb
igt/kms_flip/2x-flip-vs-rmfb-interruptible
igt/kms_flip/2x-flip-vs-wf_vblank
igt/kms_flip/2x-flip-vs-wf_vblank-interruptible
igt/kms_flip/2x-modeset-vs-vblank-race
igt/kms_flip/2x-modeset-vs-vblank-race-interruptible
igt/kms_flip/2x-nonexisting-fb
igt/kms_flip/2x-nonexisting-fb-interruptible
igt/kms_flip/2x-plain-flip
igt/kms_flip/2x-plain-flip-fb-recreate
igt/kms_flip/2x-plain-flip-fb-recreate-interruptible
igt/kms_flip/2x-plain-flip-interruptible
igt/kms_flip/2x-plain-flip-ts-check
igt/kms_flip/2x-plain-flip-ts-check-interruptible
igt/kms_flip/2x-rcs-flip-vs-dpms
igt/kms_flip/2x-rcs-flip-vs-dpms-interruptible
igt/kms_flip/2x-rcs-flip-vs-modeset
igt/kms_flip/2x-rcs-flip-vs-modeset-interruptible
igt/kms_flip/2x-rcs-flip-vs-panning
igt/kms_flip/2x-rcs-flip-vs-panning-interruptible
igt/kms_flip/2x-rcs-wf_vblank-vs-dpms
igt/kms_flip/2x-rcs-wf_vblank-vs-dpms-interruptible
igt/kms_flip/2x-rcs-wf_vblank-vs-modeset
igt/kms_flip/2x-rcs-wf_vblank-vs-modeset-interruptible
igt/kms_flip/2x-single-buffer-flip-vs-dpms-off-vs-modeset
igt/kms_flip/2x-single-buffer-flip-vs-dpms-off-vs-modeset-interruptible
igt/kms_flip/2x-vblank-vs-dpms-suspend
igt/kms_flip/2x-vblank-vs-dpms-suspend-interruptible
igt/kms_flip/2x-vblank-vs-hang
igt/kms_flip/2x-vblank-vs-hang-interruptible
igt/kms_flip/2x-vblank-vs-modeset-suspend
igt/kms_flip/2x-vblank-vs-modeset-suspend-interruptible
igt/kms_flip/2x-vblank-vs-suspend
igt/kms_flip/2x-vblank-vs-suspend-interruptible
igt/kms_flip/2x-wf_vblank
igt/kms_flip/2x-wf_vblank-interruptible
igt/kms_flip/2x-wf_vblank-ts-check
igt/kms_flip/2x-wf_vblank-ts-check-interruptible
igt/kms_flip/2x-wf_vblank-vs-dpms
igt/kms_flip/2x-wf_vblank-vs-dpms-interruptible
igt/kms_flip/2x-wf_vblank-vs-modeset
igt/kms_flip/2x-wf_vblank-vs-modeset-interruptible


Output:
[root at x-sgb3 tests]# ./kms_flip --run-subtest 2x-absolute-wf_vblank
IGT-Version: 1.7-g3f50598 (x86_64) (Linux:
3.16.0-rc4_drm-intel-next-queued_d101c8_20140710+ x86_64)
Test assertion failure function kmstest_force_connector, file igt_kms.c:461:
Failed assertion: debugfs_fd != -1
Last errno: 2, No such file or directory
Subtest 2x-absolute-wf_vblank: FAIL


==Reproduce steps==
---------------------------- 
1. ./kms_flip --run-subtest 2x-absolute-wf_vblank

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