diver ~ % vblank_mode=0 optirun -vv glxgears                                                            [130] 1:20:48
[49393.420231] [DEBUG]Reading file: /etc/bumblebee/bumblebee.conf
[49393.420608] [INFO]Configured driver: nvidia
[49393.420917] [DEBUG]optirun version 3.2.1-2017-01-30-Format:%h$ starting...
[49393.420935] [DEBUG]Active configuration:
[49393.420943] [DEBUG] bumblebeed config file: /etc/bumblebee/bumblebee.conf
[49393.420950] [DEBUG] X display: :8
[49393.420958] [DEBUG] LD_LIBRARY_PATH: /usr/lib64/opengl/nvidia/lib:/usr/lib32/opengl/nvidia/lib:/usr/lib/opengl/nvidia/lib
[49393.420966] [DEBUG] Socket path: /var/run/bumblebee.socket
[49393.420976] [DEBUG] Accel/display bridge: auto
[49393.420989] [DEBUG] VGL Compression: proxy
[49393.421015] [DEBUG] VGLrun extra options:
[49393.421035] [DEBUG] Primus LD Path: /usr/lib/primus:/usr/lib32/primus
[49393.421102] [DEBUG]Using auto-detected bridge primus
[49393.878068] [INFO]Response: Yes. X is active.

[49393.878077] [INFO]Running application using primus.
[49393.878172] [DEBUG]Process glxgears started, PID 19505.
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
1508 frames in 5.0 seconds = 301.525 FPS
1561 frames in 5.0 seconds = 312.121 FPS
^C[49404.578932] [WARN]Received Interrupt signal.
[49404.578948] [DEBUG]Socket closed.
[49404.591836] [DEBUG]SIGCHILD received, but wait failed with No child processes
[49404.591850] [DEBUG]Socket closed.
[49404.591854] [DEBUG]Killing all remaining processes.