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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Intel HD 520 failed to train DP when connected with a external monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93578#c57">Comment # 57</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Intel HD 520 failed to train DP when connected with a external monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93578">bug 93578</a>
from <span class="vcard"><a class="email" href="mailto:sonny@fastmail.net" title="sonny@fastmail.net">sonny@fastmail.net</a>
</span></b>
<pre>In case it's helping I'm getting
[ 120.800144] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[ 28.659223] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR*
failed to enable link training
[ 28.929015] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to start
channel equalization
and a bunch of
[ 120.183252] WARNING: CPU: 0 PID: 795 at drivers/gpu/drm/i915/intel_pm.c:3675
skl_update_other_pipe_wm+0x177/0x180 [i915]
with laptop screen flickers when I connect an external HDMI screen to my Dell
DA200 adapter connected to an XPS 13 Skylake.
4.7.6-1-ARCH</pre>
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