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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [KBL] Black screen at boot, unknown DP link BW code 0 warning"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103400#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [KBL] Black screen at boot, unknown DP link BW code 0 warning"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103400">bug 103400</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>Can you please attach the entire DPCD here for posterity? Oh and EDID would be
nice as well.
This should normally work (needs CONFIG_DRM_DP_AUX_CHARDEV=y in the kernel
config):
cat /dev/drm_dp_aux0 > dpcd
But if there are read errors you will have to use someting like ddrescue to
read it out.
For the EDID you can use:
cat /sys/class/drm/card0-eDP-1/edid > edid</pre>
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