The problem & solution is described in the Arch wiki: https://wiki.archlinux.org/index.php/steam#Steam_runtime_issues
The solution described works for me - it looks like Steam bundles some older libraries that conflict with what is included in Ubuntu 15.04. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437379 Title: Steam don't start To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/steam/+bug/1437379/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs