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<body><span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - X segfaults on startup in r300_dri.so, making system unusable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107655">bug 107655</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>dri-devel@lists.freedesktop.org
</td>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>RESOLVED
</td>
<td>REOPENED
</td>
</tr>
<tr>
<td style="text-align:right;">QA Contact</td>
<td>dri-devel@lists.freedesktop.org
</td>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
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<td style="text-align:right;">Component</td>
<td>Drivers/Gallium/r300
</td>
<td>Drivers/Gallium/swr
</td>
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<tr>
<td style="text-align:right;">Resolution</td>
<td>NOTOURBUG
</td>
<td>---
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - X segfaults on startup in r300_dri.so, making system unusable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107655#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - X segfaults on startup in r300_dri.so, making system unusable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107655">bug 107655</a>
from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
<pre>(In reply to Sergey Kondakov from <a href="show_bug.cgi?id=107655#c4">comment #4</a>)
<span class="quote">> I don't know the actual reason of the crash but the guys there figured out that
> the crash was coming from AVX instruction in Mesa's SWR code. The affected
> machine does not support any kind of AVX, so it threw out the error. But it's
> unclear why SWR even been trying to initialize during the load of r300_dri.</span >
I think it's the combination of two things:
* All Gallium drivers are linked into a single binary (so-called mega-driver)
* SWR is compiled with AVX support and has initializers which are automatically
executed when the above binary is dlopen()ed.
Until there's a solution for this, SWR cannot be enabled in a build which has
to run on non-AVX capable CPUs.</pre>
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