NAME

       primusrun - run an application on a discrete NVIDIA video card

SYNOPSIS

       primusrun command

DESCRIPTION

       Primus implements low-overhead local-only client-side OpenGL offloading via GLX forking.

       It  is  currently  intended to be used alongside Bumblebee and provides a drop-in replacement for optirun
       (i.e. "primusrun").

VARIABLES

       The following is a list of environment variables affecting primus library that may be  relevant  for  end
       users:

       PRIMUS_SYNC
           Readback-display synchronization method (default: 0)
           0: no sync, 1: synced, display previous frame, 2: synced, display latest frame

       PRIMUS_VERBOSE
           Verbosity level (default: 1)
           0: only errors, 1: warnings, 2: profiling

       PRIMUS_DISPLAY
           The secondary Xorg server display number (default: :8)

EXAMPLES

       primusrun glxgears -info
              Runs  the  graphics demo supplied by mesa-utils to confirm whether the discrete card is being used
              for GL rendering.

       PRIMUS_VERBOSE=2 primusrun glxgears
              Runs the graphics demo supplied by mesa-utils with verbose output from primus.

       vblank_mode=0 primusrun glxgears
              Disable vblank synchronisation, typically used for benchmarking purposes.

ISSUES

       Since compositing hurts performance, invoking primus when a compositing WM is active is not  recommended.
       If  you  need to use primus with compositing and see flickering or bad performance, synchronizing primus'
       display thread with the application's rendering thread may help.

       PRIMUS_SYNC=1 primusrun ...

       This makes primus display the previously rendered frame. Alternatively, with  PRIMUS_SYNC=2  primus  will
       display the latest rendered frame, trading frame rate for reduced visual latency.

AUTHOR

       Primus was created by Alexander Monakov <amonakov@gmail.com>.

       This  manual  page was written by Vincent Cheng <Vincentc1208@gmail.com>, for the Debian project (and may
       be used by others).