[Bug 94867] Random black screens for 1/2 second to 1 second when using HDMI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94867

--- Comment #1 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to SmallwoodDR82 from comment #0)
> Attaching dmesg with drm.debug=0xe enabled.

Please attach dmesg all the way from boot to reproducing the problem, use
log_buf_len=4M or similar as necessary. There's a couple of underruns in the
logs, but it's not conclusive that this is the root cause for the issue you're
experiencing.

FIFO[    4.557470] [drm:audio_config_hdmi_pixel_clock] Configuring HDMI audio
for pixel clock 148500 (0x00090000)\
[    4.558114] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder A\
[    4.558117] [drm:cpt_irq_handler] *ERROR* PCH transcoder A FIFO underrun\

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