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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW Regression]dmesg error "<3>[ 1.954836] [drm:gen8_irq_handler] *ERROR* The master control interrupt lied (SDE)!" after boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80896#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW Regression]dmesg error "<3>[ 1.954836] [drm:gen8_irq_handler] *ERROR* The master control interrupt lied (SDE)!" after boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80896">bug 80896</a>
from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=102730" name="attach_102730" title="dmesg">attachment 102730</a> <a href="attachment.cgi?id=102730&action=edit" title="dmesg">[details]</a></span>
dmesg
(In reply to <a href="show_bug.cgi?id=80896#c2">comment #2</a>)
<span class="quote">> No need to bisect, the error message was introduced by Oscar in
>
> commit 38cc46d73ed99dd7002f1406002e52d7975d16cc
> Author: Oscar Mateo <<a href="mailto:oscar.mateo@intel.com">oscar.mateo@intel.com</a>>
> Date: Mon Jun 16 16:10:59 2014 +0100
>
> drm/i915/bdw: Ack interrupts before handling them (GEN8)
>
> And for those reason bit 23 of master ctl is set and the SDE IIR is 0.</span >
Revert this commit on latest -next-queued，error "<3>[ 1.955683]
[drm:gen8_irq_handler] *ERROR* The master control interrupt lied (SDE)!" unable
to reproduce, but here has another error. Please check the output below. Need
we report a new bug for this?
Output:
[root@x-bdw01 ~]# dmesg -r | egrep "<[1-3]>" |grep drm
<3>[ 2.753243] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.768133] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.780219] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.792092] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.804271] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.813306] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[ 2.831054] [drm:intel_dp_start_link_train] *ERROR* failed to update link
training
<3>[ 2.832254] [drm:intel_dp_complete_link_train] *ERROR* failed to train
DP, aborting</pre>
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