[Bug 85890] New: [BDW]igt/drv_missed_irq_hang sporadically causes *ERROR* Unclaimed register detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85890

            Bug ID: 85890
           Summary: [BDW]igt/drv_missed_irq_hang sporadically causes
                    *ERROR* Unclaimed register detected
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         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

==System Environment==
--------------------------
Regression: not sure 
Non-working platforms: BDW

==kernel==
--------------------------
drm-intel-nightly/782bafb46cc12737b16e5007583bd7b534c6202a

==Bug detailed description==
It sporadically causes *ERROR* Unclaimed register detected when run automation
testing. Run 20 cycles manually, the error is unable to reproduce. It happens 3
times in recently 10 days automation testing.

Run log:
@test: Intel_gpu_tools/igt_drv_missed_irq_hang
info: @@@Returncode: 0

test case start at: Wed Nov  5 07:43:30 2014
test case end at:   Wed Nov  5 07:43:45 2014

Errors:


Dmesg:
<3>[ 2301.921963] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR*
Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this
problem.
<6>[ 2305.936790] [drm] Fake missed irq on render ring
<6>[ 2307.937879] [drm] Fake missed irq on video enhancement ring
<6>[ 2311.935929] [drm] Fake missed irq on blitter ring


Output:
             command   pid dev master a   uid      magic
Test Environment check: Succeeded.
[1/1] dmesg-warn: 1 Running Test(s): 0
[1/1] dmesg-warn: 1 Running Test(s): 1


Thank you for running Piglit!
Results have been written to /GFX/Test/Piglit/piglit/t
{
    "results_version": 2,
    "uname": "Linux x-bdw05 3.18.0-rc3_drm-intel-nightly_782baf_20141104+ #1162
SMP Tue Nov 4 11:31:45 CST 2014 x86_64 x86_64 x86_64 GNU/Linux\n",
    "time_elapsed": 11.816837072372437,
    "tests": {
        "igt/drv_missed_irq_hang": {
            "dmesg": "[ 2301.921963] [drm:hsw_unclaimed_reg_detect.isra.6
[i915]] *ERROR* Unclaimed register detected. Please use the i915.mmio_debug=1
to debug this problem.",
            "returncode": 0,
            "err": "",
            "environment": "PIGLIT_SOURCE_DIR=\"/GFX/Test/Piglit/piglit\"
PIGLIT_PLATFORM=\"mixed_glx_egl\"",
            "command":
"/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests/drv_missed_irq_hang",
            "result": "dmesg-warn",
            "time": 11.618579149246216,
            "out": "Interrupts masked\nInterrupts unmasked\nCleared missed
interrupts\n"
        }
    },
    "name": "t",
    "lspci": "00:00.0 Host bridge: Intel Corporation Device 1604 (rev
08)\n00:02.0 VGA compatible controller: Intel Corporation Device 1616 (rev
08)\n00:03.0 Audio device: Intel Corporation Device 160c (rev 08)\n00:14.0 USB
controller: Intel Corporation Device 9cb1 (rev 03)\n00:16.0 Communication
controller: Intel Corporation Device 9cba (rev 03)\n00:19.0 Ethernet
controller: Intel Corporation Ethernet Connection (3) I218-LM (rev 03)\n00:1f.0
ISA bridge: Intel Corporation Device 9cc3 (rev 03)\n00:1f.2 SATA controller:
Intel Corporation Device 9c83 (rev 03)\n00:1f.3 SMBus: Intel Corporation Device
9ca2 (rev 03)\n00:1f.6 Signal processing controller: Intel Corporation Device
9ca4 (rev 03)\n",
    "options": {
        "profile": [
            "tests/igt.py"
        ],
        "dmesg": false,
        "execute": true,
        "log_level": "quiet",
        "concurrent": "some",
        "valgrind": false,
        "sync": false,
        "filter": [
            "igt/drv_missed_irq_hang$"
        ],
        "platform": "mixed_glx_egl",
        "exclude_tests": [],
        "env": {
            "PIGLIT_SOURCE_DIR": "/GFX/Test/Piglit/piglit",
            "PIGLIT_PLATFORM": "mixed_glx_egl"
        },
        "exclude_filter": []
    }
}
returncode: 0
result: dmesg-warn
summary: Intel_gpu_tools/igt_drv_missed_irq_hang    DMESG_WARN

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