https://bugs.freedesktop.org/show_bug.cgi?id=80419
--- Comment #18 from higuita@gmx.net --- On steam, you can select the game, right click on it, select proprieties , launch options and put
apitrace %command%
you can run the game with gdb, strace , etc using this option. it will output to the console, so start steam in a terminal if you need to see the output