Comment # 12 on bug 1011250 from Johannes Weberhofer

So far I didn't have any issues reagarding the reported problems using the
test-kernel.

What I see in the dmsg are the following messages:
[86000.248277] snd_hda_codec_hdmi hdaudioC0D2: HDMI: ELD buf size is 0, force
128
[86000.248382] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD data byte 0
[86000.263372] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe C FIFO underrun
[86000.263428] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[86866.901476] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

Whenever a "underrun" message occures, one of my thre screens turns off an - a
few seconds later - on again.