[Bug 103313] [CI] [KBL only] igt@* - dmesg-warn - *ERROR* LSPCON mode hasn't settled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103313

--- Comment #52 from Marta Löfstedt <marta.lofstedt at intel.com> ---
https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4268/shard-hsw7/igt@kms_vblank@pipe-a-ts-continuation-dpms-suspend.html

run.log:
running: igt/kms_vblank/pipe-a-ts-continuation-dpms-suspend

[29/97] skip: 11, pass: 18 /                               
FATAL: command execution failed
...
Completed CI_IGT_test CI_DRM_3800/shard-hsw7/8 : FAILURE
CI_IGT_test runtime 316 seconds
Rebooting shard-hsw7

from dmesg:
<7>[ 4400.744449] [IGT] kms_vblank: starting subtest
pipe-A-ts-continuation-dpms-suspend
...
Last dmesg:
<7>[ 4400.845869] [drm:sandybridge_pcode_write_timeout [i915]] warning: pcode
(write of 0x00000011 to mbox 11) mailbox access failed for hsw_write_dcomp
[i915]: -6
<7>[ 4400.845922] [drm:hsw_write_dcomp [i915]] Failed to write to D_COMP
<7>[ 4400.850952] [drm:intel_runtime_suspend [i915]] Device suspended

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