[Bug 88097] New: [BDW Bisected]igt/pm_rpm/system-suspend fails at the 2nd cycle when execlists enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88097

            Bug ID: 88097
           Summary: [BDW Bisected]igt/pm_rpm/system-suspend fails at the
                    2nd cycle when execlists enabled
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111834
  --> https://bugs.freedesktop.org/attachment.cgi?id=111834&action=edit
dmesg

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

Non-working platforms:  BDW

==kernel==
--------------------------
drm-intel-next-queued/27401d126b5b1c8dd4df98bbb60b09ff2b3d5e60

==Bug detailed description==
-----------------------------
It fails at the 2nd cycle on BDW with -nightly and -queued kernel(We disabled
this case in regular testing due to system lost IP after suspend,pls refer to
the blacklist).
Bisect shows: 27401d126b5b1c8dd4df98bbb60b09ff2b3d5e60 is the first bad commit
commit 27401d126b5b1c8dd4df98bbb60b09ff2b3d5e60
Author:     Thomas Daniel <thomas.daniel at intel.com>
AuthorDate: Thu Dec 11 12:48:35 2014 +0000
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Mon Dec 15 11:25:28 2014 +0100

    drm/i915/bdw: Enable execlists by default where supported

    Execlist support in the i915 driver is now considered good enough for the
    feature to be enabled by default on Gen8 and later and routinely tested.
    Adjusted i915 parameters structure initialization to reflect this and
updated
    the comment in intel_sanitize_enable_execlists().

    There's still work to do before we can let the wider massive onto it,
    but there's still time left before the 3.20 cutoff.

    v2: Update the MODULE_PARM_DESC too.

    Issue: VIZ-2020
    Signed-off-by: Thomas Daniel <thomas.daniel at intel.com>
    [danvet: Add note that there's still some work left to do.]
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

output:
rtcwake: wakeup from "mem" using /dev/rtc0 at Mon Jan  1 23:46:19 2001
IGT-Version: 1.9-gcb512b6 (x86_64) (Linux: 3.18.0-rc7_kcloud_27401d_20141219+
x86_64)
Runtime PM support: 1
PC8 residency support: 1
Test assertion failure function system_suspend_subtest, file pm_rpm.c:1398:
Failed assertion: wait_for_suspended()
Last errno: 2, No such file or directory
Subtest system-suspend: FAIL (13.438s)

==Reproduce steps==
---------------------------- 
1.

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