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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW mobile GT3e]System will hangs after executed "echo mem > /sys/power/state" on x86_64 OS"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72779">72779</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW mobile GT3e]System will hangs after executed "echo mem > /sys/power/state" on x86_64 OS
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>system Environment:
--------------------------
platform: haswell
CPU: Intel(R) Core(TM) i7-4950HQ CPU @ 2.40GHz
Libdrm: (master)libdrm-2.4.50
Mesa: (master)7435d9f77c84a57ad9bbed2e6558c0f06cac5cd6
Xf86_video_intel:(master)2.99.906-79-gbd22abee8f33b20ff6bc7297b0a9ae8708d18727
Cairo: (master)8e11a42e3e9b679dce97ac45cd8b47322536a253
Libva: (staging)1264cd81fd8728f18bd2feedf6e9c1a232663890
Libva_intel_driver:(staging)2a61b0d17072bdc5b58608e3dfa2c4f9f80dcec4
Kernel: (drm-intel-nightly) 2a9f2367690435ba1d3132c92a71300d2dbe90ba
Bug detailed description:
-------------------------
On haswell mobile GT3e(with 64bit kernel), System will hangs after executed
"echo mem > /sys/power/state". It works well with 32bit kernel.
Unable to got dmesg because the system will hangs after executed "echo mem >
/sys/power/state"
This bug unable to reproduce on other HSW(CPU: Intel(R) Core(TM) i7-4700MQ CPU
@ 2.40GHz or Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz)
Reproduce steps:
--------------------
1. echo mem > /sys/power/state</pre>
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