Update (Improved Solution)
I have posted a better solution here: elza.me/blog/2016/06/Steam/
If you are running Steam on linux you may very well run into the situation where your client fails to start after a system upgrade. Today when I started steam I was greeted with the following:
$ steam Running Steam on arch rolling 64-bit STEAM_RUNTIME is enabled automatically Installing breakpad exception handler for appid(steam)/version(1411443970) libGL error: unable to load driver: r600_dri.so libGL error: driver pointer missing libGL error: failed to load driver: r600 libGL error: unable to load driver: swrast_dri.so libGL error: failed to load driver: swrast
We are unable to load the necessary drivers. All too often this is to due to a symlink being broken. Below is a fix given the above error output.
$ cd .local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/ $ mv libstdc++.so.6.0.18 libstdc++.so.6.0.18.remove $ rm libstdc++.so.6 $ cd ~/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/lib/x86_64-linux-gnu/ $ mv libstdc++.so.6.0.18 libstdc++.so.6.0.18.remove $ rm libstdc++.so.6
In each directory we are renaming
libstdc++.so.6.0.18 so it is no longer used, but keeping it in case we need it later. We then remove the symbolic link that went to
libstdc++.so.6.0.18. Now when you start your Steam client again, it should download the needed drivers automatically.
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