computador@computador:~$ LIBGL_DEBUG=verbose steam
Running Steam on arch rolling 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1459463254)
libGL: OpenDriver: trying /usr/lib32/xorg/modules/dri/tls/i915_dri.so
libGL: OpenDriver: trying /usr/lib32/xorg/modules/dri/i915_dri.so
libGL: dlopen /usr/lib32/xorg/modules/dri/i915_dri.so failed (/usr/lib32/libgcrypt.so.20: symbol gpgrt_lock_lock, version GPG_ERROR_1.0 not defined in file libgpg-error.so.0 with link time reference)
libGL error: unable to load driver: i915_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: i915
libGL: OpenDriver: trying /usr/lib32/xorg/modules/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib32/xorg/modules/dri/swrast_dri.so
libGL: dlopen /usr/lib32/xorg/modules/dri/swrast_dri.so failed (/home/computador/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /usr/lib32/xorg/modules/dri/swrast_dri.so))
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast