Left 4 Dead 2, Linux, Bumblebee, game crashing when load the next step.

[Leneil]

Hi, well... people, first, i not speak english... then sorry the errors of grammar... kkk
Then, i have a small problem with this game (left 4 dead), use Linux mint 15, but this problem also occurs in Ubuntu 13.04, when I am playing, the game crashing when loads the next step.
Use the bumblebee for manage the dedicated graphics, and to launch the game, i use:

 LD_PRELOAD="$LD_PRELOAD:left4dead2/bin/matchmaking.so" optirun -b primus %command% 

Due the error "could not load library matchmaking", but I do not know what to do...
thanks for the help!

[packetguy]

i had the same problem, i am determined to file a bug report.

I have a workaround that does the job for now, got it from the interwebs.

LIBRARY_PATH=./left4dead2/bin/matchmaking.so:$LD_LIBRARY_PATH vblank_mode=0 primusrun steam