[sldev] Ubuntu Runtime Error SDL

[truxpin at adsl-209-233-23-82.dsl.snfc21.pacbell.net]

Client built on Linux Ubuntu Dapper-Drake (without llmozlib) has start-up 
failure trying to create window. Pertinent messages:
.....
2007-02-28T03:50:27Z INFO: createContext, fullscreen=0 size=800x600
2007-02-28T03:50:28Z INFO: createContext: Compiled against SDL 1.2.5
2007-02-28T03:50:28Z INFO: createContext:  Running against SDL 1.2.11
2007-02-28T03:50:28Z INFO: createContext: creating window 800x600x32
2007-02-28T03:50:28Z WARNING: createContext: window creation failure. SDL: 
		     	      Couldn't find matching GLX visual
2007-02-28T03:50:28Z INFO: destroyContext begins ......

Same error running from build dir, or unpacked tarball. I get the error even
if X display is set to 800x600.

Suggestions?

Fremont Cunningham