[Bug 90430] [HD4600 MST] DisplayPort MST crash with Dell M3800 laptop + Dell UP2414Q monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90430

--- Comment #11 from cshei at cs.indiana.edu ---
The previous kernel log goes with the screenshot I just uploaded.  Also, a
couple of the times when the monitor was showing a black screen, I saw this in
the kernel log (but hadn't booted with the drm.debug=0x1e option, so this is
all I got):

[ 4002.714910] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 4002.714923] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun

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