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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@kms_chamelium@hdmi-crc|cmp-* - fail - Chamelium RPC call failed: RPC failed at server. <class 'chameleond.devices.input_flow.InputFlowError'>:Video input not stable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109635#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@kms_chamelium@hdmi-crc|cmp-* - fail - Chamelium RPC call failed: RPC failed at server. <class 'chameleond.devices.input_flow.InputFlowError'>:Video input not stable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109635">bug 109635</a>
from <span class="vcard"><a class="email" href="mailto:contact@emersion.fr" title="emersion <contact@emersion.fr>"> <span class="fn">emersion</span></a>
</span></b>
<pre>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.</pre>
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