it's a game server program. Here is the new error message: err:winediag:X11DRV_WineGL_InitOpenglInfo Direct rendering is disabled, most likely your OpenGL drivers haven't been installed correctly The driver will be switched to Mesa if I'm using VNC, but the driver will be switched back to ATi driver if I launch it from server with monitor. P.S. I have ATi graphics card How to not use Mesa driver when using VNC?