[Bug 80121] New: [HSW Regression]igt/pm_rpm some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80121

          Priority: high
            Bug ID: 80121
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Regression]igt/pm_rpm some subcases fail
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 101209
  --> https://bugs.freedesktop.org/attachment.cgi?id=101209&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
But I didn't find good commit

Non-working platforms: HSW

==kernel==
--------------------------
origin/drm-intel-nightly: e9ce9f961282205b5954a0da4e48e96884190a77(fails)
    drm-intel-nightly: 2014y-06m-16d-21h-22m-19s integration manifest
origin/drm-intel-next-queued: 8c0f92e1f87149bd2429015c9d0600a13a34d607(fails)
    drm/i915: Fix comment about our plane remapping on gen2/3
origin/drm-intel-fixes: 223a6f2b975ab35d93270ea1d4fb6e0ac6b27fe6(fails)
    drm/i915/bdw: remove erroneous chv specific workarounds from bdw code

==Bug detailed description==
-----------------------------
igt/pm_rpm some subcases like dpms-lpsp and dpms-non-lpsp fail


Output:
[root at x-hsw26 tests]# ./pm_rpm --run-subtest dpms-lpsp
IGT-Version: 1.7-gd123de6 (x86_64) (Linux:
3.15.0-rc8_drm-intel-next-queued_8c0f92_20140617+ x86_64)
Runtime PM support: 1
PC8 residency support: 0
Test assertion failure function modeset_subtest, file pm_rpm.c:756:
Last errno: 5, Input/output error
Failed assertion: wait_for_suspended()
Subtest dpms-lpsp: FAIL

==Reproduce steps==
---------------------------- 
1. ./pm_rpm --run-subtest dpms-lpsp

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