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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - drm:intel_dp_start_link_train [i915] *ERROR* failed to enable link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109522#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - drm:intel_dp_start_link_train [i915] *ERROR* failed to enable link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109522">bug 109522</a>
from <span class="vcard"><a class="email" href="mailto:howaboutsynergy@pm.me" title="howaboutsynergy@pm.me">howaboutsynergy@pm.me</a>
</span></b>
<pre>ok I got it:
1. first turn off monitor
2. while monitor is off, run that `monoff` script from the prev. comment, yes
this:
```
sleep 1; xset dpms force suspend; sleep 1; xset dpms force off; sleep 1; xset
dpms force standby
setterm --blank force
```
3. wait a few seconds to be sure
4. press Ctrl key to wake up desktop
5. turn on monitor
got:
```
[ 694.869217] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=-110 len=5
[ 694.869243] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[ 695.138593] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=-110 len=1
[ 696.768921] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
[ 696.770645] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
[ 696.773386] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=1 len=1
```
Ok I tried it again, but left 10 seconds before actually doing step 5:
```
[ 887.319215] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=-110 len=5
[ 887.319254] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[ 887.588579] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=-110 len=1
[ 898.050275] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
[ 898.052012] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
[ 898.054707] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=1 len=1
```
So looks like link is Good afterwards(after step 5 that is), but something
keeps track of link as being still Bad (via xrandr) if it once was Bad (10
seconds ago).</pre>
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