Bug 108337 - [CI][SHARDS] igt@* - dmesg-warn - Disabling FBC due to FIFO underrun.
Summary: [CI][SHARDS] igt@* - dmesg-warn - Disabling FBC due to FIFO underrun.
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: Other All
: low normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
Whiteboard: ReadyForDev
Depends on:
Reported: 2018-10-12 10:28 UTC by Martin Peres
Modified: 2019-07-31 11:48 UTC (History)
2 users (show)

See Also:
i915 platform: BXT
i915 features: display/FBC


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Description Martin Peres 2018-10-12 10:28:23 UTC

<6> [728.571118] [IGT] kms_cursor_legacy: starting subtest cursorA-vs-flipA-atomic-transitions-varying-size
<7> [728.572096] [drm:drm_mode_addfb2] [FB:116]
<7> [728.627318] [drm:drm_mode_addfb2] [FB:117]
<7> [728.642092] [drm:drm_mode_addfb2] [FB:118]
<7> [728.642468] [drm:drm_mode_addfb2] [FB:126]
<7> [728.643308] [drm:drm_mode_addfb2] [FB:138]
<7> [728.691867] [drm:i915_fifo_underrun_reset_write [i915]] Re-arming FIFO underruns on pipe A
<3> [728.724574] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
<7> [728.725290] [drm:intel_fbc_underrun_work_fn [i915]] Disabling FBC due to FIFO underrun.
<6> [739.475176] [IGT] kms_cursor_legacy: exiting, ret=0
Comment 1 James Ausmus 2018-11-16 19:20:32 UTC
cibuglog is showing this as 0 instances in history of runs, with a 0.0% reproduction. Closing
Comment 2 Martin Peres 2018-11-16 19:40:09 UTC
CI Bug Log's reproduction rate is not accurate for low-reproductability issues.

I have plans to improve that, but until then, please click on the reproduction rate before closing. It will show you the exact instances of the issue.
Comment 3 Francesco Balestrieri 2018-12-28 09:07:58 UTC
Exactly one occurrence two and a half months ago, crickets after that. Closing.
Comment 4 Martin Peres 2019-03-08 15:07:38 UTC
Re-opening as another issue happened. There were 380 runs between them, so we need to wait until CI_DRM_9150 before closing this issue.

Dropping the priority because of the very low reproduction rate!
Comment 5 Martin Peres 2019-07-02 10:10:32 UTC
Now at CI_DRM_6394, still no reproduction. Let's wait and see!
Comment 6 Lakshmi 2019-07-31 11:48:54 UTC
Current run is CT_DRM_6590, still no new occurrences.

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