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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - System stall on Supermicro SKL boards on HEVC FEI workloads"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105955">105955</a>
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<th>Summary</th>
<td>System stall on Supermicro SKL boards on HEVC FEI workloads
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>dmitry.ermilov@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=138701" name="attach_138701" title="reproducer">attachment 138701</a> <a href="attachment.cgi?id=138701&action=edit" title="reproducer">[details]</a></span>
reproducer
Running HEVC FEI encode media workloads we see a random system stall issue.
We observe the issue on specifically this hardware:
* Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0c 10/06/2017
* video card device ID 0x191d
We do not see the bug on other SKL systems in our possession.
The issue is reproducible on CentOS 7 (7.4) with 4.14 and drm-tip (commit
29940f138482ff38047287ad288cea1fcf1f73b4) kernels.
The issue is a regression. We could bisect the faulty patch, it's below:
<a href="https://patchwork.freedesktop.org/patch/65235/">https://patchwork.freedesktop.org/patch/65235/</a>
>From bedc054eb8a2751aa22797c4a21a34029b3e5475 Mon Sep 17 00:00:00 2001
From: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>>
Date: Wed, 18 Nov 2015 19:53:50 +0200
Subject: [PATCH 08/10] drm/i915/skl: re-enable power well support
Now that the known DMC/DC issues are fixed, let's try again and
re-enable the power well support.
Please note that in order to boot on drm-tip we have to use additional
parameters:
intel_pstate=disable i915.enable_rc6=0 intel_idle.max_cstate=1
The Supermicro systems boot but i915 produces some warnings.
<a class="bz_bug_link
bz_status_NEW "
title="NEW - System stall on Supermicro SKL boards on drm-tip"
href="show_bug.cgi?id=105949">https://bugs.freedesktop.org/show_bug.cgi?id=105949</a> describes it better.
Reproducer:
1) Build this stack:
<a href="https://software.intel.com/en-us/articles/build-and-debug-open-source-media-stack">https://software.intel.com/en-us/articles/build-and-debug-open-source-media-stack</a>
2) Run:
./repr.sh
System stalls in 1-10 minutes.</pre>
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