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<body><span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
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<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - DisplayPort over USB-Type C Connector Not Recognised on Intel NUC8i5BEK (Gen 9, CoffeeLake)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112072">bug 112072</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>NEEDINFO
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<td style="text-align:right;">Whiteboard</td>
<td>
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<td>Triaged
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - DisplayPort over USB-Type C Connector Not Recognised on Intel NUC8i5BEK (Gen 9, CoffeeLake)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112072#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - DisplayPort over USB-Type C Connector Not Recognised on Intel NUC8i5BEK (Gen 9, CoffeeLake)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112072">bug 112072</a>
from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>(In reply to Geoffrey Allott from <a href="show_bug.cgi?id=112072#c0">comment #0</a>)
<span class="quote">> I am running linux kernel 5.3.1 on an Intel NUC8i5BEK which has CoffeeLake
> graphics (Intel® Iris® Plus Graphics 655).
>
> The device has two graphics output ports, 1 HDMI and 1 USB Type-C. The
> kernel reports 3 connectors; port A appears to be for embedded DisplayPort
> which is reported disconnected (there is a note "Haswell uses DDI functions
> to detect digital outputs. On SKL pre-D0 the strap isn't connected, so we
> assume it's there.").</span >
>
Even though it's reported as disconnected, edp still working?
<span class="quote">> I've connected an ASUS ROG PG278Q Monitor to the USB Type-C port using a
> Type-C to DisplayPort cable, but no video modes are reported except for the
> default VGA ones, meaning I'm stuck at a resolution of 1024x768. (The
> monitor supports 2560x1440@144). The video output does work, though.</span >
>
Are there 2 issues in this bug? edp is not working and external display works
with only resolution 1024x768?
Can you attach display info cat /sys/kernel/debug/dri/0/i915_display_info ?
Can you verify the issue with drmtip (<a href="https://cgit.freedesktop.org/drm-tip">https://cgit.freedesktop.org/drm-tip</a>)
with kernel parameters drm.debug=0x1e log_buf_len=4M.</pre>
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