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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [REGRESS] [BISECT] [i915] Monitor resolution lost"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97994#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [REGRESS] [BISECT] [i915] Monitor resolution lost"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97994">bug 97994</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>(In reply to Daniel Otero from <a href="show_bug.cgi?id=97994#c3">comment #3</a>)
<span class="quote">> Yes, between the monitor and the motherboard there's only a HDMI cable. I'm
> not aware of any kind of adaptor inside the motherboard, if that's of any
> help.
>
> I just booted the freshly compiled "dp_dual_mode_type2_broken" branch (as of
> 02676478a756db9395df0eb8387c40c887fd450d) and the problem persists.
>
> Enabling "drm.debug=0x4" in kernel comand line, I saw a line that may means
> more to you that it does to me:
>
> [ 0.697620] [drm:intel_hdmi_set_edid [i915]] Assuming DP dual mode
> adaptor presence based on VBT
> [ 0.697649] [drm:intel_hdmi_set_edid [i915]] DP dual mode adaptor (type 1
> DVI) detected (max TMDS clock: 165000 kHz)
> ...</span >
Ah. So my VBT heuristic is the problem here. Please attach a copy of
/sys/kernel/debug/dri/0/i915_opregion</pre>
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