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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ILK] Unigine Tropics hangs the GPU"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75419">75419</a>
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<th>Assignee</th>
<td>idr@freedesktop.org
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</tr>
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<th>Summary</th>
<td>[ILK] Unigine Tropics hangs the GPU
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>kenneth@whitecape.org
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>10.1
</td>
</tr>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Product</th>
<td>Mesa
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=94629" name="attach_94629" title="Bisect log (for reproducibility)">attachment 94629</a> <a href="attachment.cgi?id=94629&action=edit" title="Bisect log (for reproducibility)">[details]</a></span>
Bisect log (for reproducibility)
Running Unigine Tropics hangs the GPU on Ironlake. This occurs with 10.1 and
master, and is a regression: Mesa 10.0.3 works fine.
A bisect shows:
67ebcb4711d7c6d35df03298f065806613a62798 is the first bad commit
commit 67ebcb4711d7c6d35df03298f065806613a62798
Author: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Date: Mon Jan 13 14:32:56 2014 -0800
i965: Use the new drm_intel_bo offset64 field.
libdrm 2.4.52 introduces a new 'uint64_t offset64' field, intended to
replace the old 'unsigned long offset' field. To preserve ABI, libdrm
continues to store the presumed offset in both locations.
On Broadwell, a 64-bit kernel may place BOs at "high" (> 4G) addresses.
However, with a 32-bit userspace, the 'unsigned long offset' field will
only be 32-bit, which is not large enough to hold this value. We need
to use a proper uint64_t (like the kernel does).
Technically, a lot of this code doesn't affect Broadwell, so we could
leave it using the old field. But it makes sense to just switch to the
new, properly typed field.
Signed-off-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reviewed-by: Eric Anholt <<a href="mailto:eric@anholt.net">eric@anholt.net</a>>
Reviewed-by: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>
Steps to reproduce:
$ cd tropics
$ export MESA_EXTENSION_OVERRIDE=GL_EXT_framebuffer_multisample
$ ./1024x768_windowed.sh</pre>
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