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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>high
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW Regression]igt/module_reload causes [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 44004 and system hang with headless"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67813">67813</a>
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<th>CC</th>
<td>xunx.fang@intel.com, yangweix.shui@intel.com
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Summary</th>
<td>[HSW Regression]igt/module_reload causes [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 44004 and system hang with headless
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>major
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=83695" name="attach_83695" title="dmesg">attachment 83695</a> <a href="attachment.cgi?id=83695&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Platform: Haswell
Kernel: (drm-intel-fixes)61c2542b3b8e70fc1b82880c3ef7e2f930875b97
Bug detailed description:
-----------------------------
It happens on Haswell with -fixes ,-queued, -nightly kernel.
Run ./module_reload, system hang.No output info.
If connect VGA or DP or HDMI, It works well.
The latest known good commit:19b2dbde5732170a03bd82cc8bd442cf88d856f7
The latest known bad commit: d4eead50eb206b875f54f66cc0f6ec7d54122c28
Reproduce steps:
----------------------------
1. ./module_reload</pre>
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