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<body><span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Black screen after backlight is off"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92878">bug 92878</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
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Black screen after backlight is off"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92878#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Black screen after backlight is off"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92878">bug 92878</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>Please try this patch on top of current drm-intel-nightly:
diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c
b/drivers/gpu/drm/i915/intel_dp_link_training.c
index 88887938e0bf..ea83d02b3528 100644
--- a/drivers/gpu/drm/i915/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/intel_dp_link_training.c
@@ -234,8 +234,10 @@ intel_dp_link_training_channel_equalization(struct
intel_dp *intel_dp)
if (intel_dp_source_supports_hbr2(intel_dp) &&
drm_dp_tps3_supported(intel_dp->dpcd))
training_pattern = DP_TRAINING_PATTERN_3;
- else if (intel_dp->link_rate == 540000)
+ else if (intel_dp->link_rate == 540000) {
+ training_pattern = DP_TRAINING_PATTERN_3;
DRM_ERROR("5.4 Gbps link rate without HBR2/TPS3 support\n");
+ }
/* channel equalization */
if (!intel_dp_set_link_train(intel_dp,</pre>
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