I agree that the configuration story needs work and documentation.<p>What you could try is to set the vblank_mode=3 environment variable to force V-Sync. If that helps, it means there&#x27;s either a stale bad config file or a bug somewhere in the client API implementation...<p>Make sure you have no ~&#x2F;.drirc, and you really shouldn&#x27;t need an xorg.conf either.