[Bug 109635] [CI][BAT] igt at kms_chamelium@hdmi-crc|cmp-* - fail - Chamelium RPC call failed: RPC failed at server. <class 'chameleond.devices.input_flow.InputFlowError'>:Video input not stable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109635

--- Comment #24 from emersion <contact at emersion.fr> ---
Here are the Chamelium logs:

2018-06-04 10:34:38,691 INFO Apply EDID #1185 to port #1
2018-06-04 10:34:38,722 INFO Plug port #1                            
2018-06-04 10:34:39,827 INFO Select FpgaInputFlow #1. 
2018-06-04 10:34:39,832 INFO Initialize FpgaInputFlow #1.               
2018-06-04 10:34:39,939 INFO Initialize DisplayPort RX chip.
2018-06-04 10:34:44,983 WARNING Timeout on waiting for condition
IsVideoInputStable == True
2018-06-04 10:34:44,983 INFO Send DP HPD pulse to reset source...
2018-06-04 10:34:50,096 WARNING Timeout on waiting for condition
IsVideoInputStable == True
2018-06-04 10:34:50,098 ERROR DP FSM failed

Here are some excerpts of the kernel logs:

<4> [821.574471] snd_hda_codec_hdmi hdaudioC0D2: HDMI: pin nid 5 not registered
<3> [834.609638] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
<3> [834.783652] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
<3> [834.791391] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe C FIFO underrun

This looks like a genuine driver bug.

User impact: screen stays black after plugging in a monitor. I don't know
whether replugging the monitor helps.

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