[Bug 94605] Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94605

--- Comment #10 from anomaly256 at gmail.com ---
I'm seeing this on skylake, using the drm-intel nightlies (also sorry for cross
posting about this on bug 89806 before I saw this bug)

Using 2 monitors, one on DVI the other HDMI.  The monitor that goes blank is
using 1920x1200 res, and if I swap the outputs the monitors are using the same
monitor goes blank, that is irrespective of the output its on.  The second
monitor which appears to be behaving better is using 1920x1080 although I do
get graphical artifacts on it that follow the mouse cursor, namely white lines
stretching from the cursor to the far right edge of the display.


I've tried switching from sna to uxa, no effect.  Tried switching rendering
from gl to egl, no effect.

[ 2320.744016] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A
FIFO underrun
[ 2535.029670] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun


Linux scorched 4.6.0-rc7+ #1 SMP Fri May 13 11:04:59 AEST 2016 x86_64 Intel(R)
Core(TM) i7-6700K CPU @ 4.00GHz GenuineIntel GNU/Linux

Using nightlies fetched and built about an hour ago.

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