xorg's X11.app does not succeed at startup

[yves@…]

Clicking Macports installed X11.app make the app start and stop before anything happen.

Using "startx" does not really help

~ yves$ which startx
/opt/local/bin/startx
~ yves$ startx
bootstrap_look_up(): Unknown service name
font_cache: Scanning user font directories to generate X11 font caches
font_cache: Updating FC cache
xauth:  creating new authority file /Users/yves/.serverauth.27466

Xquartz: Could not find a new enough X11.app LSFindApplicationForInfo() returned
         X11.app = /Applications/Utilities/X11.app
         Version = 2.1.5 (2158000), Expected Version > 2.3.0
font_cache: Done
giving up.
xinit:  Connection refused (errno 61):  unable to connect to X server
xinit:  No such process (errno 3):  Server error.

of course, X11.app is in /Applications/MacPorts

[yves@…]

Here is some maybe more useful output :

~ yves$ /Applications/MacPorts/X11.app/Contents/MacOS/X11
X11.app: main(): argc=1
	argv[0] = /Applications/MacPorts/X11.app/Contents/MacOS/X11.bin
Waiting for startup parameters via Mach IPC.
X11.app: Could not connect to server (DISPLAY is not set).  Starting X server.
X11.app: Launching /opt/local/bin/startx:
	argv[0] = /bin/sh
	argv[1] = -c
	argv[2] = /opt/local/bin/startx
font_cache: Scanning user font directories to generate X11 font caches
bootstrap_look_up(): Unknown service name
font_cache: Updating FC cache
xauth:  creating new authority file /Users/yves/.serverauth.92814

X11.app: do_start_x11_server(): argc=6
	argv[0] = /opt/local/bin/X
	argv[1] = :4
	argv[2] = -nolisten
	argv[3] = tcp
	argv[4] = -auth
	argv[5] = /Users/yves/.serverauth.92814
2009-02-01 21:01:27.932 X11.bin[92803:717] Could not connect the action apps_table_cancel: to target of class X11Controller
Xquartz starting:
X.Org X Server 1.4.2-apple32
Build Date: 20090201
(EE) XKB: Couldn't open rules file /opt/local/share/X11/xkb/rules/base
(EE) XKB: Couldn't open rules file /opt/local/share/X11/xkb/rules/base
Could not init font path element /opt/local/share/fonts/misc/, removing from list!
Could not init font path element /opt/local/share/fonts/TTF/, removing from list!
Could not init font path element /opt/local/share/fonts/OTF, removing from list!
Could not init font path element /opt/local/share/fonts/Type1/, removing from list!
Could not init font path element /opt/local/share/fonts/100dpi/, removing from list!
Could not init font path element /opt/local/share/fonts/75dpi/, removing from list!
Could not init font path element /Library/Fonts, removing from list!
Could not init font path element /System/Library/Fonts, removing from list!

Fatal server error:
could not open default font 'fixed'
   AbortDDX
Quitting Xquartz...
Xquartz: start_x11_server: (ipc/mig) server died
Gandalf:~ yves$ giving up.
xinit:  Connection refused (errno 61):  unable to connect to X server
xinit:  No such process (errno 3):  Server error.
font_cache: Done