Created attachment 109581 [details]
dmesg

==System Environment==
--------------------------
Regression: No,
The tests always fails, wihich tracked by bug 83915 before.

Non-working platforms: BYT/BSW

==kernel==
--------------------------
origin/drm-intel-nightly: e49ebf9ed863e9522260ebd7bd0338ef5641c0e6(fails)
    drm-intel-nightly: 2014y-11m-16d-14h-35m-45s UTC integration manifest
origin/drm-intel-next-queued: cf3d262e39941d8f148148e840c00fcbc35a8e6f(fails)
    drm/i915: Fix comments about CHV snoop behaviour
origin/drm-intel-fixes: bab51d9733964ac7978bd9376b9da54662a1815f(fails)
    drm/i915: Kick fbdev before vgacon

==Bug detailed description==
igt/pm_rps subcases reset and blocking fail

Output:
root@x-byt06:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rps --run-subtest reset 
IGT-Version: 1.8-gb35b150 (x86_64) (Linux: 3.18.0-rc4_drm-intel-nightly_3b6da7_20141116+ x86_64) 
Test assertion failure function matchit, file pm_rps.c:128: 
Failed assertion: freqs1[CUR] == freqs2[CUR] 
error: 200 != 244 
Subtest reset: FAIL (48.215s) 
Test assertion failure function load_helper_stop, file pm_rps.c:253: 
Failed assertion: igt_wait_helper(&lh.igt_proc) == 0 
Last errno: 10, No child processes 
pm_rps: igt_core.c:865: igt_fail: Assertion `!test_with_subtests || in_fixture' failed. 
Aborted 
root@x-byt06:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rps --run-subtest blocking 
IGT-Version: 1.8-gb35b150 (x86_64) (Linux: 3.18.0-rc4_drm-intel-nightly_3b6da7_20141116+ x86_64) 
Test assertion failure function idle_check, file pm_rps.c:407: 
Failed assertion: freqs[CUR] == freqs[MIN] 
error: 200 != 178 
Subtest blocking: FAIL (45.477s) 

==Reproduce steps==
---------------------------- 
1. ./pm_rps --run-subtest blocking