[Bug 86365] New: [PNV/BSW]igt/kms_pipe_crc_basic some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86365

            Bug ID: 86365
           Summary: [PNV/BSW]igt/kms_pipe_crc_basic some subcases fail
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org,
                    jinxianx.guo at intel.com

Created attachment 109583
  --> https://bugs.freedesktop.org/attachment.cgi?id=109583&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, it has bug 75079

Non-working platforms: PNV/BSW

Bug detailed description:
-----------------------------
kms_pipe_crc_basic some subcases fail on PNV and BSW,  bug 75079 mentioned it
randomly timeout or fail, the timeout goes away, file this bug to trace fail.


run  ./kms_pipe_crc_basic --run-subtest read-crc-pipe-A-frame-sequence 
output:                                                                        
                IGT-Version: 1.8-gaa63fc7 (x86_64) (Linux:
3.18.0-rc4_drm-intel-nightly_e49ebf_20141117+ x86_64)
read-crc-pipe-A-frame-sequence: Testing connector eDP-1 using pipe A
Test assertion failure function igt_wait_for_vblank, file igt_kms.c:1712:
Failed assertion: drmWaitVBlank(drm_fd, &wait_vbl) == 0
Last errno: 16, Device or resource busy
Subtest read-crc-pipe-A-frame-sequence: FAIL (5.223s)

Reproduce steps:
----------------------------
1. ./kms_pipe_crc_basic

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