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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Scalar FS validation failed on glDrawElements with GL_NONE draw buffer"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94444">94444</a>
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<th>Summary</th>
<td>Scalar FS validation failed on glDrawElements with GL_NONE draw buffer
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
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<th>Version</th>
<td>11.2
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>org.freedesktop@io7m.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=122158" name="attach_122158" title="Makefile">attachment 122158</a> <a href="attachment.cgi?id=122158&action=edit" title="Makefile">[details]</a></span>
Makefile
Hello.
I'm using the following setup:
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Intel Open Source Technology Center (0x8086)
Device: Mesa DRI Intel(R) Sandybridge Mobile (0x116)
Version: 11.1.2
Accelerated: yes
Video memory: 1536MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 3.3
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.1.2
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
Linux copperhead 4.4.3-1-ARCH #1 SMP PREEMPT Fri Feb 26 15:09:29 CET 2016
x86_64 GNU/Linux
The following small program will trigger an assertion failure when calling
glDrawArrays().
The problem seems to be triggered by declaring a vec2 fragment shader output,
and writing to it, but without having an associated color attachment on the
framebuffer and with all framebuffer draw buffers set to GL_NONE.
I've included sources as attachments, but you may prefer the git repository
here:
<a href="https://github.com/io7m/mesa-intel-bug-20160308">https://github.com/io7m/mesa-intel-bug-20160308</a>
Just "make && ./bug". I've also included an apitrace.</pre>
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