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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BISECTED] EDID read failure breaks display mirroring"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107390#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BISECTED] EDID read failure breaks display mirroring"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107390">bug 107390</a>
from <span class="vcard"><a class="email" href="mailto:harry.wentland@amd.com" title="Harry Wentland <harry.wentland@amd.com>"> <span class="fn">Harry Wentland</span></a>
</span></b>
<pre>Looks like a faulty board that reports a port as connected when it shouldn't.
Windows driver has a policy to only report that as connected if it's DP, but
not for HDMI, which is likely why we've never spotted this before.
Do you have more information on your graphics card (manufacturer/model)?
Can you also print vbios_version?
As sudo:
cd /sys
cat $(find -name 'vbios_version')</pre>
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