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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 - GPU hang in compute shader"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103228">103228</a>
</td>
</tr>
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<th>Summary</th>
<td>GPU hang in compute shader
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<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>sgunderson@bigfoot.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>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=134798" name="attach_134798" title="GPU hang log">attachment 134798</a> <a href="attachment.cgi?id=134798&action=edit" title="GPU hang log">[details]</a></span>
GPU hang log
Hi,
I'm developing a compression system through compute shaders. The first shader
now works fine, but after adding a second shader (even if it's got an empty
main()), I've started getting GPU hangs:
[2557115.719316] [drm] GPU HANG: ecode 7:0:0x8fd8ffff, in narabu-encoder
[11429], reason: Hang on rcs0, action: reset
[2557115.719318] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[2557115.719319] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[2557115.719320] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[2557115.719321] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[2557115.719321] [drm] GPU crash dump saved to /sys/class/drm/card0/error
This is a Haswell laptop (Lenovo X240), Mesa 17.2.2, kernel 4.13.0. Attached is
a gzipped crash dump (error.gz). My current code is available at
<a href="https://storage.sesse.net/haswell-gpu-hang.tar.xz">https://storage.sesse.net/haswell-gpu-hang.tar.xz</a>
Make narabu-encoder and run it; it hangs the GPU nearly every time for me,
adding 125 ms or so to the measured runtime.</pre>
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