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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Dirt showdown very low fps (~3fps) after update mesa"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99995#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Dirt showdown very low fps (~3fps) after update mesa"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99995">bug 99995</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>One difference is that 17.0 has GL 4.3 enabled for Maxwell (e.g. GTX 750),
which perhaps causes the game to choose a different path, thus not really be
directly comparable. Try it with
MESA_GL_VERSION_OVERRIDE=4.1
which will get it back to the same GL version that was available with 13.0. Or
try it with
MESA_EXTENSION_OVERRIDE='-GL_ARB_shader_image_load_store
-GL_ARB_compute_shader'</pre>
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