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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - UnrealEngine v4 demos startup fails to blorp blit assert"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98431">98431</a>
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<th>Summary</th>
<td>UnrealEngine v4 demos startup fails to blorp blit assert
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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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
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>idr@freedesktop.org
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<th>Reporter</th>
<td>eero.t.tamminen@intel.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>Latest Mesa from git (a1652a0) aborts at UnrealEngine v4 demos [1] startup to:
-----------
$ INTEL_DEBUG=perf SunTemple/Binaries/Linux/SunTemple
...
128x51744 miptree too large to blit, falling back to untiled
SIMD16 shader failed to compile: CS compile failed: Failure to register
allocate. Reduce number of live scalar values to avoid this.
Multi-LOD fast clear - giving up (2048x1024x11).
Multi-LOD fast clear - giving up (2048x1024x11).
SunTemple: ../../../src/intel/blorp/blorp_blit.c:1767:
surf_convert_to_uncompressed: Assertion `*height % fmtl->bh == 0 || *y +
*height == info->surf.logical_level0_px.height' failed.
Aborted (core dumped)
-----------
Assert happens for Stylized, Sun Temple, Light Room Interior Day, Subway
Reflections and Effects Cave demos. They work fine with Mesa 12.0.3.
There's no assert in Atlantis demo.
[1] <a href="https://wiki.unrealengine.com/Linux_Demos">https://wiki.unrealengine.com/Linux_Demos</a>
Note: in Effects cave & Reflections Subway demos the compilation of CS shaders
(using "Unsupported form of variable indexing") takes so much time (tens of
minutes?) that I didn't have patience to wait for them to start, but used
MESA_GL_VERSION_OVERRIDE=4.2 to disable CS use.</pre>
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