Quake4: No dynamic GL support in video driver

--------------- R_InitOpenGL ----------------
Initializing SDL subsystem
Loading GL driver 'libGL.so.1' through SDL
TODO: Sys_SetClipboardData
********************
ERROR: SDL_GL_LoadLibrary libGL.so.1 failed: No dynamic GL support in video driver

********************
--------------- BSE Shutdown ----------------
---------------------------------------------
WARNING: rvServerScanGUI::Clear() - invalid scanGUI

idRenderSystem::Shutdown()
Sys_Error: SDL_GL_LoadLibrary libGL.so.1 failed: No dynamic GL support in video driver

Чего делать то ?
Система Slackware current, драйвер nvidia последний, GeForce4Ti4200
SDL-1.2.9

Спасибо.