I have just install doom3 in my neo folder using scons (ubuntu 11.04). I typed ./doom.x86 and I got the following message.
DOOM 1.3.1.1304-debug linux-x86 Nov 24 2011 00:27:04
found interface lo - loopback
found interface eth0 - 10.0.0.19/255.255.255.0
no 'base' directory in exe path /home/kun /doom3.gpl/neo, skipping
WARNING: using hardcoded default base path
------ Initializing File System ------
Current search path:
/home/kun/.doom3/base
/usr/local/games/doom3/base
game DLL: 0x0 in pak: 0x0
Addon pk4s:
file system initialized.
--------------------------------------
Unknown command 'vid_restart'
idRenderSystem::Shutdown()
Sys_Error: Couldn't load default.cfg
