Comment 11 for bug 1488719

Created attachment 102730
dmesg

(In reply to comment #2)
> No need to bisect, the error message was introduced by Oscar in
>
> commit 38cc46d73ed99dd7002f1406002e52d7975d16cc
> Author: Oscar Mateo <email address hidden>
> 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.
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