[Bug 85829] [IVB]igt/kms_force_connector fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85829

--- Comment #1 from lu hua <huax.lu at intel.com> ---
Created attachment 109183
  --> https://bugs.freedesktop.org/attachment.cgi?id=109183&action=edit
dmesg

I reproduce it on HSW. Run ./kms_flip --run-subtest
vblank-vs-modeset-rpm-interruptible then run ./kms_force_connector. 
If clean boot then run ./kms_force_connector, it works well.

output:
[root at x-hsw27 tests]# ./kms_flip --run-subtest
vblank-vs-modeset-rpm-interruptible
IGT-Version: 1.8-gc049c39 (x86_64) (Linux:
3.18.0-rc3_drm-intel-fixes_dc54e7_20141109+ x86_64)
Using monotonic timestamps
Beginning vblank-vs-modeset-rpm-interruptible on crtc 8, connector 18
  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
...
vblank-vs-modeset-rpm-interruptible on crtc 8, connector 18: PASSED

Beginning vblank-vs-modeset-rpm-interruptible on crtc 12, connector 18
  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
..
vblank-vs-modeset-rpm-interruptible on crtc 12, connector 18: PASSED

Beginning vblank-vs-modeset-rpm-interruptible on crtc 16, connector 18
  1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
..
vblank-vs-modeset-rpm-interruptible on crtc 16, connector 18: PASSED

Subtest vblank-vs-modeset-rpm-interruptible: SUCCESS (12.252s)
[root at x-hsw27 tests]# ./kms_force_connector
IGT-Version: 1.8-gc049c39 (x86_64) (Linux:
3.18.0-rc3_drm-intel-fixes_dc54e7_20141109+ x86_64)
Test assertion failure function main, file kms_force_connector.c:118:
Failed assertion: temp->connection == vga_connector->connection

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