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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 - [bisected] spec.ext_framebuffer_multisample.alpha-to-coverage-dual-src-blend fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91151">91151</a>
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<th>Summary</th>
<td>[bisected] spec.ext_framebuffer_multisample.alpha-to-coverage-dual-src-blend fails
</td>
</tr>
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<th>Product</th>
<td>piglit
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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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>tests
</td>
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<th>Assignee</th>
<td>piglit@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>mark.a.janes@intel.com
</td>
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<th>QA Contact</th>
<td>piglit@lists.freedesktop.org
</td>
</tr></table>
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<pre>with piglit 44456ba,
spec.ext_framebuffer_multisample.alpha-to-coverage-dual-src-blend
fails for the 2,4,6 and 8 variants. The test regresses on bdw, bsw,
byt, hsw, ivb, skl, and snb. Sample test output below:
/tmp/build_root/m64/lib/piglit/bin/ext_framebuffer_multisample-alpha-to-coverage-dual-src-blend
8 -auto -fbo
Probe color at (0,30)
Expected: 0.015542 0.540720 0.003562 0.355078
Observed: 0.015686 0.600000 0.003922 0.396078
Probe color at (0,60)
Expected: 0.022253 0.469956 0.007782 0.328125
Observed: 0.023529 0.564706 0.007843 0.388235
Probe color at (0,90)
Expected: 0.006639 0.478194 0.123930 0.330859
Observed: 0.007843 0.576471 0.121569 0.396078
Probe color at (0,120)
Expected: 0.193928 0.624989 0.191135 0.375000
Observed: 0.192157 0.698039 0.188235 0.423529
Probe color at (0,150)
Expected: 0.340842 0.506519 0.016304 0.472266
Observed: 0.341176 0.529412 0.015686 0.486275
Probe color at (0,180)
Expected: 0.065178 0.331757 0.207457 0.634375
Observed: 0.062745 0.274510 0.207843 0.596078
Probe color at (0,210)
Expected: 0.183156 0.854469 0.762897 0.873047
Observed: 0.180392 0.690196 0.760784 0.764706
Probe color at (0,240)
Expected: 0.960013 1.000000 0.486724 1.000000
Observed: 0.960784 0.913726 0.486275 1.000000</pre>
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