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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 - Firefox for WebGL fallbacks to swrast_dri.so, not using radeon_si.so"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107516">107516</a>
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<th>Summary</th>
<td>Firefox for WebGL fallbacks to swrast_dri.so, not using radeon_si.so
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI 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
</td>
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<th>Component</th>
<td>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>bugs.freedesktop.org@pm.port0.org
</td>
</tr></table>
<p>
<div>
<pre>With recent build of libdrm (2.4.93) Mozilla Firefox cannot use accelerated
WebGL, use software emulation instead.
HW. AMD RX560 and AMD WX2100 (RX550).
SW. Ubuntu 16.04 with kernels 4.17.X and 4.18.rc from
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/">http://kernel.ubuntu.com/~kernel-ppa/mainline/</a>, plus Oibaf's PPA builds of drm,
mesa, etc. <a href="https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers">https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers</a>
Symptoms. Firefox works OK, but on site with WebGL it works very slow - due to
fallback to software GL rendering.
Note. about:support page in Firefox DOES show correct driver info:
WebGL 1 Driver Renderer X.Org -- AMD Radeon Pro WX2100 (POLARIS12, DRM 3.26.0,
4.18.0-041800rc6-generic, LLVM 6.0.1)
But, on WebGL site (ex. windy.com), swrast_dri.so get loaded and eats all CPU
cores.</pre>
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</p>
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