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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BYT Bisected]igt/pm_rpm/debugfs-forcewake-user causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81200#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BYT Bisected]igt/pm_rpm/debugfs-forcewake-user causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81200">bug 81200</a>
from <span class="vcard"><a class="email" href="mailto:ming.yao@intel.com" title="yaoming <ming.yao@intel.com>"> <span class="fn">yaoming</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=81200#c4">comment #4</a>)
<span class="quote">> commit f68d697eaf3278200a7fc3c8b1d95d72837b84d8
> Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
> Date: Mon Aug 4 07:15:09 2014 +0100
>
> drm/i915: only hook up hpd pulse for DP outputs</span >
It also causes system hang.
[root@x-byt01 ~]# cd /GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests
[root@x-byt01 tests]# ./pm_rpm --run-subtest debugfs-forcewake-user
IGT-Version: 1.7-g5c7bcb1 (x86_64) (Linux: 3.16.0-rc4_ym_f68d69_20140815+
x86_64)
Runtime PM support: 1
PC8 residency support: 0</pre>
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