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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #2 from Guo Jinxian <jinxianx.guo at intel.com> ---
This bug still able to reproduce on latest
-fixes(a0d036b074b4a5a933e37fcb9bdd6b3cc80a0387) while running test cases below
on HSW：

case list:
igt/kms_pipe_crc_basic/bad-nb-words-1
igt/kms_pipe_crc_basic/bad-nb-words-3
igt/kms_pipe_crc_basic/bad-pipe
igt/kms_pipe_crc_basic/bad-source
igt/kms_pipe_crc_basic/hang-read-crc-pipe-A
igt/kms_pipe_crc_basic/hang-read-crc-pipe-B
igt/kms_pipe_crc_basic/hang-read-crc-pipe-C
igt/kms_pipe_crc_basic/read-crc-pipe-A
igt/kms_pipe_crc_basic/read-crc-pipe-A-frame-sequence
igt/kms_pipe_crc_basic/read-crc-pipe-B
igt/kms_pipe_crc_basic/read-crc-pipe-B-frame-sequence
igt/kms_pipe_crc_basic/read-crc-pipe-C
igt/kms_pipe_crc_basic/read-crc-pipe-C-frame-sequence
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-A
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-B
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-C

Output:
[root at x-hsw27 tests]# ./kms_pipe_crc_basic --run-subtest bad-nb-words-1
IGT-Version: 1.7-g70e6ed9 (x86_64) (Linux:
3.16.0-rc6_drm-intel-fixes_a0d036_20140723+ 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 bad-nb-words-1: FAIL

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