[Bug 75145] New: [SNB Regression]igt/kms_flip/flip-vs-modeset-vs-hang doesn't exit testing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75145

          Priority: medium
            Bug ID: 75145
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [SNB Regression]igt/kms_flip/flip-vs-modeset-vs-hang
                    doesn't exit testing
        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 94270
  --> https://bugs.freedesktop.org/attachment.cgi?id=94270&action=edit
dmesg

System Environment:
--------------------------
Platform: Sandybridge
kernel:   (drm-intel-nightly)1be8f2b4dd6d3db00af24d4891c82d2650bd282d

Bug detailed description:
---------------------------
Run ./kms_flip --run-subtest flip-vs-modeset-vs-hang, It doesn't exit testing.
It happens on Sandybridge with -queued and -nightly kernel.

TThe latest known good commit: c461562e84d180fb691af57f93a42bd9cc7eb69c
The latest known bad commit:  4c0e552882114d1edb588242d45035246ab078a0

output:
IGT-Version: 1.5-g9597836 (i686) (Linux:
3.13.0_drm-intel-nightly_1be8f2_20140218+ i686)
Using monotonic timestamps
Beginning flip-vs-modeset-vs-hang on crtc 3, connector 7
  1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x48 108000
...Test assertion failure function exec_nop, file kms_flip.c:693:
Last errno: 5, Input/output error
Failed assertion: drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf) == 0
Subtest flip-vs-modeset-vs-hang: FAIL
Test assertion failure function gem_quiescent_gpu, file drmtest.c:156:
Last errno: 5, Input/output error
Failed assertion: drmIoctl((fd), ((((1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x29)) << 0) | ((((sizeof(struct
drm_i915_gem_execbuffer2)))) << ((0+8)+8)))), (&execbuf)) == 0

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

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