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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Black Screen on Ubuntu 18.04 + Intel Graphics with Kernel > 4.15.0-47"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111495#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Black Screen on Ubuntu 18.04 + Intel Graphics with Kernel > 4.15.0-47"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111495">bug 111495</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>Something wrong with gmbus:
[ 91.093546] [drm:intel_hdmi_detect [i915]] [CONNECTOR:88:HDMI-A-1]
[ 91.106728] i915 0000:00:02.0: HDMI-A-1: EDID is invalid:
[ 91.106735] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
...
Even bitbanging doesnt work:
[ 91.106887] [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read failed,
retry using GPIO bit-banging
[ 91.106978] [drm:intel_gmbus_force_bit [i915]] enabling bit-banging on i915
gmbus dpb. force bit now 1
[ 91.140230] i915 0000:00:02.0: HDMI-A-1: EDID is invalid:
[ 91.140234] [00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
...
All reads just return 0 for some reason.</pre>
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