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<body><span class="vcard"><a class="email" href="mailto:elizabethx.de.la.torre.mena@intel.com" title="Elizabeth <elizabethx.de.la.torre.mena@intel.com>"> <span class="fn">Elizabeth</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Hard lock when unplugging and reconnecting external USB-C DP display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103474">bug 103474</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>REOPENED
</td>
</tr>
<tr>
<td style="text-align:right;">i915 platform</td>
<td>
</td>
<td>KBL
</td>
</tr>
<tr>
<td style="text-align:right;">i915 features</td>
<td>
</td>
<td>display/atomic
</td>
</tr>
<tr>
<td style="text-align:right;">Whiteboard</td>
<td>
</td>
<td>ReadyForDev
</td>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Hard lock when unplugging and reconnecting external USB-C DP display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103474#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Hard lock when unplugging and reconnecting external USB-C DP display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103474">bug 103474</a>
from <span class="vcard"><a class="email" href="mailto:elizabethx.de.la.torre.mena@intel.com" title="Elizabeth <elizabethx.de.la.torre.mena@intel.com>"> <span class="fn">Elizabeth</span></a>
</span></b>
<pre>There are a lot of "Link Training failed" errors through the dmesg. Sample:
...
[drm:drm_dp_dpcd_access [drm_kms_helper]] Too many retries, giving up. First
error: -110
[drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training
[drm:intel_dp_start_link_train [i915]] Link Training failed at link rate =
540000, lane count = 4
[drm:intel_dp_modeset_retry_work_fn [i915]] [CONNECTOR:63:DP-2]
...
[drm:intel_dp_start_link_train [i915]] Channel equalization failed 5 times
[drm:intel_dp_set_idle_link_train [i915]] *ERROR* Timed out waiting for DP idle
patterns
[drm:intel_dp_start_link_train [i915]] Link Training failed at link rate =
540000, lane count = 4
[drm:intel_dp_modeset_retry_work_fn [i915]] [CONNECTOR:63:DP-2]
[drm:intel_dp_check_mst_status [i915]] got esi 41 10 00
[drm:intel_dp_check_mst_status [i915]] got esi2 41 10 00
[drm:intel_dp_check_mst_status [i915]] channel EQ not ok, retraining
[drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting for DDI BUF C idle
bit</pre>
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