Created attachment 115141 [details]
dmesg

==System Environment==
--------------------------
Regression: Yes

good commit: 2015_04_07/drm-intel-nightly/333cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13
bad commit: 2015_04_17/drm-intel-nightly/d600654ab94b325f253e267422dcf60302120ea0

Non-working platforms: BSW

==kernel==
--------------------------
drm-intel-nightly/d600654ab94b325f253e267422dcf60302120ea0
commit d600654ab94b325f253e267422dcf60302120ea0
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Apr 16 17:54:10 2015 +0200

    drm-intel-nightly: 2015y-04m-16d-15h-53m-28s UTC integration manifest

==Bug detailed description==
-----------------------------
It fails on BSW with drm-intel-nightly kernel. It works well drm-intel-next-queued, drm-fixes, drm-next, drm-intel-fixes kernel.

run ./pm_rpm --run-subtest fences
output:
IGT-Version: 1.10-gbeddb3b (x86_64) (Linux: 4.0.0_drm-intel-nightly_d60065_20150417+ x86_64)
Runtime PM support: 1
PC8 residency support: 0
Test assertion failure function fences_subtest, file pm_rpm.c:1760:
Failed assertion: wait_for_suspended()
Last errno: 2, No such file or directory
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [fences_subtest+0x3c8]
  #2 [main+0x1162]
  #3 [__libc_start_main+0xf5]
  #4 [_start+0x29]
  #5 [<unknown>+0x29]
Subtest fences failed.
**** DEBUG ****
Test assertion failure function fences_subtest, file pm_rpm.c:1760:
Failed assertion: wait_for_suspended()
Last errno: 2, No such file or directory
****  END  ****
Subtest fences: FAIL (10.369s)

==Reproduce steps==
---------------------------- 
1. ./pm_rpm --run-subtest fences