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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#c20">Comment # 20</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>Created <span class=""><a href="attachment.cgi?id=144603" name="attach_144603" title="dmesg with drm.debug=0x1e on both just console and within X">attachment 144603</a> <a href="attachment.cgi?id=144603&action=edit" title="dmesg with drm.debug=0x1e on both just console and within X">[details]</a></span>
dmesg with drm.debug=0x1e on both just console and within X
only while inside X (ie. startx) `drm.debug=0x1e` constantly generates dmesg
spam
I'm attaching full dmesg log (ring buffer didn't wrap around and thus no
overwrites) with drm.debug=0x1e
First I tried in console only (tty1) and the issue doesn't happen there, so
this is good:
[ 6.032810] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
however on console/tty1 , it requires running `monon` in order to unblank!
Pressing enter didn't do anything, so between these two messages I couldn't see
what I was typing:
[ 222.564063] snd_hda_intel 0000:00:1f.3: power state changed by ACPI to D3hot
[ 229.562650] user[1383]: '/home/user/bin/monon'(on /dev/tty1) is executing:
'sleep 1'
I guess at
[ 395.795237] [drm:drm_atomic_state_init [drm]] Allocated atomic state
0000000023bfb3ad
I ran `startx` and that's when the spam started.
At about
[ 415.457985] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=5 len=5
I ran a normal monoff then turned on monitor test, so this wouldn't have caused
the -110 (link training issue) - I actually forgot (sort of) the steps I was
supposed to do here, so ignore this.
I did it right at:
[ 443.388949] [drm:intel_dp_set_link_train [i915]] *ERROR* ret=-110 len=5
so between these two I waited: after pressing the key(433) to then turning on
monitor(441, 8 seconds later):
[ 433.005944] [drm:__drm_atomic_state_free [drm]] Freeing atomic state
0000000076021904
[ 441.745985] [drm:drm_atomic_state_init [drm]] Allocated atomic state
0000000076021904
and like 2 sec later is the -110 mentioned above.
Looks like it's those:
[ 441.820989] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7d4003ff
that Manasi mentions in <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][fi-skl-6700hq only] igt@* - dmesg-warn - *ERROR* failed to enable link training"
href="show_bug.cgi?id=105998#c5">https://bugs.freedesktop.org/show_bug.cgi?id=105998#c5</a>
however since I've tried with `i915.disable_power_well=0` in my previous
comment(albeit without the `drm.debug=0x1e` - does it matter though?!) and it
had no effect, I'm out of ideas..
-------
monon is essentially this:
#!/bin/bash
roon() {
local ec
logger "'$0'(on $(tty)) is executing: '$*'"
"$@" ; ec="$?"
if test "$ec" != "0"; then
logger "'$0' failed(ec='$ec') executing: '$*'"
fi
return "$ec"
}
roon sleep 1
roon xset dpms force on
roon setterm --blank poke
#to also get back from blanking
roon xset s reset
-------
monoff is this:
#!/bin/bash
roon() {
local ec
logger "'$0'(on $(tty)) is executing: '$*'"
"$@" ; ec="$?"
if test "$ec" != "0"; then
logger "'$0' failed(ec='$ec') executing: '$*'"
fi
return "$ec"
}
roon sleep 1
roon xset dpms force suspend
roon sleep 1
roon xset dpms force off
roon sleep 1
roon xset dpms force standby
roon setterm --blank force
-------</pre>
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