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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][SKL] *ERROR* failed to enable link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101144">101144</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BAT][SKL] *ERROR* failed to enable link training
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin.peres@free.fr
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>The test igt@kms_flip@basic-flip-vs-dpms generated a dmesg error (but still
passed) when running on fi-skl-6700hq on CI_DRM_2640:
[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 =
270000, lane count = 2
This is possibly related to the following message a little above in the logs
(up to the warning reported by piglit):
[...]
[ 420.613916] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 420.622421] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 420.630911] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 420.630939] [drm:drm_dp_dpcd_access] Too many retries, giving up. First
error: -110
[ 420.634122] [drm:intel_dp_sink_dpms [i915]] failed to enable sink power
state
[...]
[ 421.172326] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.180857] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.180869] [drm:drm_dp_dpcd_access] Too many retries, giving up. First
error: -110
[ 421.180893] [drm:intel_dp_set_signal_levels [i915]] Using signal levels
00000000
[ 421.180911] [drm:intel_dp_set_signal_levels [i915]] Using vswing level 0
[ 421.180971] [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level
0
[ 421.180991] [drm:intel_dp_program_link_training_pattern [i915]] Using DP
training pattern TPS1
[...]
[ 421.412348] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.420917] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.429499] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.438068] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.446637] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.455206] [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x7d4003ff
[ 421.455218] [drm:drm_dp_dpcd_access] Too many retries, giving up. First
error: -110
[ 421.455240] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[ 421.455261] [drm:intel_dp_start_link_train [i915]] Link Training failed at
link rate = 270000, lane count = 2
[ 421.455353] [drm:intel_dp_modeset_retry_work_fn [i915]] [CONNECTOR:48:eDP-1]</pre>
</div>
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