Option "GLXVBlank" "boolean"
Synchronize GLX clients to VBlank. Useful where tearing is a problem, harmful if the GPU isn't fast enough to keep up with the monitor refresh rate. Default: on.
Option "SwapLimit" "integer"
Set maximum allowed number of pending OpenGL double-buffer swaps for a drawable before a client is blocked. A value of 1 corresponds to double-buffering. A value of 2 corresponds to triple-buffering. Higher values may allow higher framerate, but also increase lag for interactive applications, e.g., games. Nouveau currently reliably supports a maximum value of 2 on XOrg 1.12+. A maximum setting of 2 on older x-servers is allowed, but it will break conformance with the OpenML OML_sync_control specification and will cause failure of soft‐ ware that relies on correct presentation timing behaviour as defined in that specification. Default: 1.