18.04 update to libglapi-mesa/libglx-mesa0 causes vlc crash

[Nataraj]

OS: Ubuntu 18.04.1 running in a kvm VM under Ubuntu 18.04 with all latest updates.
Description: Ubuntu 18.04.1 LTS
Release: 18.04
apt-cache policy vlc
vlc:
  Installed: 3.0.4-1ubuntu0.2
  Candidate: 3.0.4-1ubuntu0.2
  Version table:
 *** 3.0.4-1ubuntu0.2 500
        500 http://mirrors.namecheap.com/ubuntu bionic-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     3.0.3-1-1ubuntu1 500
        500 http://mirrors.namecheap.com/ubuntu bionic-security/universe amd64 Packages
     3.0.1-3build1 500
        500 http://mirrors.namecheap.com/ubuntu bionic/universe amd64 Packages

apt-cache policy libglapi-mesa
libglapi-mesa:
  Installed: 18.2.2-0ubuntu1~18.04.1
  Candidate: 18.2.2-0ubuntu1~18.04.1
  Version table:
 *** 18.2.2-0ubuntu1~18.04.1 500
        500 http://mirrors.namecheap.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     18.0.0~rc5-1ubuntu1 500
        500 http://mirrors.namecheap.com/ubuntu bionic/main amd64 Packages

libglx-mesa0:
  Installed: 18.2.2-0ubuntu1~18.04.1
  Candidate: 18.2.2-0ubuntu1~18.04.1
  Version table:
 *** 18.2.2-0ubuntu1~18.04.1 500
        500 http://mirrors.namecheap.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     18.0.0~rc5-1ubuntu1 500
        500 http://mirrors.namecheap.com/ubuntu bionic/main amd64 Packages

When I install the updated library versions listed above vlc crashes. I have experienced this with multiple mp4 files.

When I revert these libraries to the following older versions, it works correctly:

hi libglapi-mesa:amd64 18.0.5-0ubuntu0~18.04.1 amd64 free implementation of the GL API -- shared library
hi libglx-mesa0:amd64 18.0.5-0ubuntu0~18.04.1 amd64 free implementation of the OpenGL API -- GLX vendor library

I am enclosing a log of a gdb session including a backtrace.

Thank You.
Nataraj

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1814808/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Nataraj (incoming-ubuntu)]

Package libglapi-mesa and libglx-mesa0 are codependant upon each other. I don't know where the bug actually is, but through the process of elimination I have determined that installing the latest versions of these libraries breaks vlc and reverting to older versions fixes it. I have tried setting the package name to libglapi-mesa and it won't accept that name. I have also tried libglx-mesa0.

As far as I can see dpkg and apt-cache lead me to believe these are the names of these packages, so I'm not sure what the bug interface in launchpad wants for a package name. Furthermore, from the backtrace, it looks like the actual crash is in another module from what I can tell.

I am only reporting at this time, that updating these two packages creates the problem.

Thank You.

[Timo Aaltonen (tjaalton)]

try the updates ppa, which has mesa 18.2.8:

https://launchpad.net/~ubuntu-x-swat/+archive/ubuntu/updates

[Nataraj (incoming-ubuntu)]

Installing mesa 18.2.8 from the updates ppa fixes the problem.