Bug 86189 - [BSW]igt/drv_missed_irq_hang sporadically causes *ERROR* pipe B underrun
Summary: [BSW]igt/drv_missed_irq_hang sporadically causes *ERROR* pipe B underrun
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-11-12 07:34 UTC by lu hua
Modified: 2017-07-24 22:50 UTC (History)
2 users (show)

See Also:
i915 platform: BSW/CHT
i915 features: display/Other

Attachments
dmesg (127.75 KB, text/plain)
2014-11-12 07:34 UTC, lu hua 		no flags Details
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Description lu hua 2014-11-12 07:34:44 UTC 
Created attachment 109327 [details]
dmesg

==System Environment==
--------------------------
Regression: not sure, fail rate:1/10
Non-working platforms: BSW

==kernel==
--------------------------
drm-intel-nightly/9a7620f405895714b4e0dc3181a8328b4406287e

==Bug detailed description==
It sporadically causes "<3>[  673.232605] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe B underrun" on BSW with -nightly kernel. fail rate: 1/10.

output:
Interrupts masked
Interrupts unmasked
Cleared missed interrupts


==Reproduce steps==
---------------------------- 
1. ./drv_missed_irq_hang
Comment 1 lu hua 2015-01-29 06:50:14 UTC 
drv_hangman also sporadically causes this error.
@test: Intel_gpu_tools/igt_drv_hangman_error-state-capture-blt
returncode: 0
info: @@@Returncode: 0

test case start at: Sun Jan 18 07:40:10 2015
test case end at:   Sun Jan 18 07:40:39 2015

Errors:


Dmesg:
<3>[   89.783289] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
<6>[   91.783839] [drm] stuck on blitter ring
<6>[   91.815444] [drm] GPU HANG: ecode 8:2:0xfffffffe, in drv_hangman [5231], reason: Ring hung, action: reset
<6>[   91.815458] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
<6>[   91.815462] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
<6>[   91.815464] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
<6>[   91.815467] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
<6>[   91.815470] [drm] GPU crash dump saved to /sys/class/drm/card0/error
<6>[   91.817453] [drm] Simulated gpu hang, resetting stop_rings
<5>[   91.817457] drm/i915: Resetting chip after gpu hang
Comment 2 Jani Nikula 2015-02-12 12:14:17 UTC 
Chris or Mika, is this normal for hangman?
Comment 3 Jani Nikula 2015-02-12 12:15:31 UTC 
Apart from the hang, potentially related to bug 85908.
Comment 4 Jani Nikula 2015-10-23 10:21:11 UTC 
(In reply to Jani Nikula from comment #3)
> Apart from the hang, potentially related to bug 85908.

Presumed fixed upstream, closing. Please reopen if the problem persists with latest kernels.

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