https://bugs.freedesktop.org/show_bug.cgi?id=101262
--- Comment #3 from Emil Velikov emil.l.velikov@gmail.com --- (In reply to Anthony Jagers from comment #2)
My guess is I need help in tracing this. How would you trace a steam game?
See https://wiki.archlinux.org/index.php/Steam/Troubleshooting#Debugging_Steam
No idea which extension the game uses, so it may be that Mesa does not implement it.
IIRC only GLX_MESA_query_renderer is done - see the output of glxinfo. You'll get something like
Extended renderer info (GLX_MESA_query_renderer): Vendor: Intel Open Source Technology Center (0x8086) Device: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2) (0x1616) Version: 17.0.7 Accelerated: yes Video memory: 3072MB Unified memory: yes Preferred profile: core (0x1) Max core profile version: 4.5 Max compat profile version: 3.0 Max GLES1 profile version: 1.1 Max GLES[23] profile version: 3.1