I'm running Xinerama with Intel HD and nvidia combined. This makes me unable to initiate an OpenGL context, which I'm fine with. The nvidia client, however, is unable to start without an OpenGL context. This is understandable, since it's a gaming platform, but it also makes me unable to reach my Steam friends when I'm running dual head, which is a problem for me.

$ sudo -u steam -- steam
/home/steam/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
/home/steam/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
Running Steam on arch  64-bit
/home/steam/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1447125378)
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast

I don't know how deeply rooted OpenGL is in the Steam client, but I'd greatly appreciate being able to start the Steam client even when I'm not trying to play games.