Comment 32 for bug 259219

I've confirmed that updating fixes this. Thank you! -Nate

On Wed, Mar 16, 2011 at 5:10 AM, Andrea Carpineti
<email address hidden>wrote:

> Hi Konstantin,
> just upgrade your system. You can use the command:
> sudo apt-get update; sudo apt-get upgrade
>
> More details can be found at
> https://help.ubuntu.com/community/AptGet/Howto
> If you don't update your system from a while the libgl1-mesa-glx package
> will be updated and this bug will be fixed (thank to Chris!!! :D ).
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (734402).
> https://bugs.launchpad.net/bugs/259219
>
> Title:
> Broken TLS support in libGL.so AKA: software-center crashed with
> SIGSEGV in __cxa_allocate_exception()
>
> Status in “mesa” package in Ubuntu:
> Fix Released
> Status in “software-center” package in Ubuntu:
> Fix Released
> Status in “mesa” source package in Natty:
> Fix Released
> Status in “software-center” source package in Natty:
> Fix Released
>
> Bug description:
> Binary package hint: libgl1-mesa-dri
>
> ---
> Software Center error description from apport is: software-center crashed
> with SIGSEGV in __cxa_allocate_exception()
> WORKAROUND for the software-center crash:
>
> Launch Software Center from the command line as:
>
> LD_PRELOAD=/usr/lib/libstdc++.so.6 software-center
>
> For more details about the software-center crash, please see bug 731724.
> ---
>
> The package libgl1-mesa-dri in Intrepid seems to have been compiled with
> the option --enable-glx-tls. This triggers a bug in src/glx/x11/glxcurrent.c
> :
> The TLS variable __glX_tls_Context is compiled with the TLS model
> initial-exec, which is only ment for executables. Used in shared libraries,
> it can break TLS usage in other shared libraries.
> One example is when libGL is linked beforce libstdc++ in another library,
> which is then loaded via dlopen(). In this case, the TLS variables in
> libstdc++ aren't properly initialized, and it will segfault when trying to
> allocate an exception.
> I think there are 2 possible solutions:
> 1. Do not compile with --enabgle-glx-tls
> 2. Patch mesa to remove the tls-model attribute. I assume this will eat up
> the performance gain of TLS, since initial-exec is meant as an optimisation
> for apps not using the GL over dlopen directly or indirectly.
>
> Policy information about my libGL package:
> libgl1-mesa-dri:
> Installiert: 7.1~rc3-1ubuntu4
> Kandidat: 7.1~rc3-1ubuntu4
> Versions-Tabelle:
> *** 7.1~rc3-1ubuntu4 0
> 500 http://de.archive.ubuntu.com intrepid/main Packages
> 100 /var/lib/dpkg/status
>
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>