Comment 50 for bug 256021

Steve, those were the packages but my point is that I don't have any nvidia
hardware. I may have high jacked this thread though and branched off to a
subject that was not the original one.

Sorry if I did.

On Sun, Mar 21, 2010 at 12:14 AM, Steve Langasek <
<email address hidden>> wrote:

> jockey pulls in nvidia-common, nvidia-185-modaliases,
> nvidia-173-modaliases, and nvidia-96-modaliases; none of these packages
> contain the nvidia drivers.
>
> --
> glxinfo crashed with SIGSEGV in __libc_start_main()
> https://bugs.launchpad.net/bugs/256021
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “mesa” package in Ubuntu: Fix Released
> Status in “mesa” source package in Jaunty: Fix Released
> Status in “mesa” source package in Karmic: Fix Released
>
> Bug description:
> [Impact]
>
> Fixes segmentation faults in glXGetFBConfigs() that happen frequently when
> the nvidia binary drivers are present on the system (even if they are not in
> use) by adding a null pointer check. While the SEGV seems innocuous since it
> only happens with glxinfo, quite a few essential programs such as compiz use
> glxinfo to detect GL capabilities and this causes problems. This is fixed in
> Karmic which as of this time has mesa 7.4.1, but the issue still stands in
> jaunty's 7.4.
>
> [Symptoms]
> Segfaults in glxinfo. glxinfo reporting Xlib: extension "GLX" missing on
> display.
>
> [Patch]
> http://launchpadlibrarian.net/28340399/mesa_7.4-0ubuntu3.2.debdiff
>
> [Test Case]
> In an affected system (such as one with nvidia drivers loaded)
> 1. Run glxinfo
> 2. Errors with a segfault
> 3. Attempt to start compiz
> 4. Fails to start because it can't run glxinfo
>
> [Regression Potential]
> Essentially none. It simply adds a null pointer check right before
> dereferencing it.
> This fix has been tested in Karmic as well as upstream for some time, and
> was included in the 7.4.1 bugfix release.
>
> UPDATE:Oct 8 2008. installed daily updates ( 2.6.27-6-generic ) and still
> getting this same glxinfo error on boot
>
>
> ------------------------------------------------------------------------------------------------------------------------------------
>
> I was running PlayOnLinux and tried to install 3d acceleration from there
> when glxinfo crashed.
>
> Description: Ubuntu intrepid (development branch)
> Release: 8.10
>
> mesa version : 7.1~rc3-1ubuntu2 (intrepid)
>
> ProblemType: Crash
> Architecture: i386
> DistroRelease: Ubuntu 8.10
> ExecutablePath: /usr/bin/glxinfo
> NonfreeKernelModules: nvidia
> Package: mesa-utils 7.1~rc3-1ubuntu2
> ProcAttrCurrent: unconfined
> ProcCmdline: glxinfo
> ProcEnviron:
> SHELL=/bin/bash
>
> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
> LANG=en_US.UTF-8
> Signal: 11
> SourcePackage: mesa
> Stacktrace:
> #0 0x0804ad66 in ?? ()
> #1 0xb7d66685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
> #2 0x08048e81 in ?? ()
> StacktraceTop:
> ?? ()
> __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
> ?? ()
> ThreadStacktrace:
> .
> Thread 1 (process 7142):
> #0 0x0804ad66 in ?? ()
> #1 0xb7d66685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
> #2 0x08048e81 in ?? ()
> Title: glxinfo crashed with SIGSEGV in __libc_start_main()
> Uname: Linux 2.6.26-5-generic i686
> UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare
>
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