X 윈도우가 안됩니다.

안녕하세요? 

갑자기 X 윈도우가 되지 않아서 엄청 고생을 하고 있습니다.
여러곳에서 찾아보고 노력해봤지만, 도무지 해결할 수가 없네요.
여러분들의 도움을 좀 부탁드립니다.

리눅스 배포판은 페도라 코어5 입니다.
갑자기 X윈도우가 뜨지 않습니다. (그래픽모드로 설정되어있습니다)

그래픽 모드로 처음에 부팅은 정상적으로 되다가,
최종적으로 ID와 패스워드를 넣는 그래픽 화면이 나올때
모니터가 깜박이다가 에러 화면이 뜹니다.

/var/log/Xorg.setup.log 에 있는 에러 메시지는 다음과 같습니다.
xorg.conf 파일의 내용도 함께 덧붙입니다.

----------------------------------------------------------------------------

X Window System Version 7.0.0
Release Date: 21 December 2005
X Protocol Version 11, Revision 0, Release 7.0
Build Operating System:Linux 2.6.9-34.ELsmp i686Red Hat, Inc.
Current Operating System: Linux thjung.trao.re.kr 2.6.17-1.2174_FC5smp #1 SMP Tue Aug 8 16:00:39 EDT 2006 i686
Build Date: 30 June 2006
 Before reporting problems, check http://wiki.x.org
 to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
 (++) from command line, (!!) notice, (II) informational,
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/dev/null", Time: Sat Aug 19 15:09:32 2006
(++) Using config file: "/tmp/tmpsRil7ixorg.config"
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
>                   Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
Could not init font path element unix/:7100, removing from list!

Fatal server error:
could not open default font 'fixed'

------------------------------------------------------------------------------

혹시나 도움이 될까 해서 제 xorg.conf 파일내용도 올립니다.

----------------------------------------------

# XFree86 4 configuration created by pyxf86config

Section "ServerLayout"
 Identifier     "Default Layout"
 Screen      0  "Screen0" 0 0
 InputDevice    "Mouse0" "CorePointer"
 InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, a font server independent of the X server is
# used to render fonts.
 FontPath     "unix/:7100"
EndSection

Section "Module"
 Load  "dbe"
 Load  "extmod"
 Load  "fbdevhw"
 Load  "glx"
 Load  "record"
 Load  "freetype"
 Load  "type1"
 Load  "dri"
EndSection

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds"  "1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults).  For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# Or if you just want both to be control, use:
# Option "XkbOptions" "ctrl:nocaps"
#
 Identifier  "Keyboard0"
 Driver      "kbd"
 Option     "XkbModel" "pc105"
 Option     "XkbLayout" "us"
 Option     "XkbVariant" "intl"
EndSection

Section "InputDevice"
 Identifier  "Mouse0"
 Driver      "mouse"
 Option     "Protocol" "IMPS/2"
 Option     "Device" "/dev/input/mice"
 Option     "ZAxisMapping" "4 5"
 Option     "Emulate3Buttons" "yes"
EndSection

Section "Monitor"

 ### Comment all HorizSync and VertSync values to use DDC:
 ### Comment all HorizSync and VertSync values to use DDC:
 Identifier   "Monitor0"
 VendorName   "Monitor Vendor"
 ModelName    "Samsung SyncMaster 959NF/900NF/909NF/CN199A(P)"
 DisplaySize  360 270
 ### Comment all HorizSync and VertSync values to use DDC:
 HorizSync    30.0 - 110.0
 VertRefresh  50.0 - 160.0
 Option     "dpms"
EndSection

Section "Device"
 Identifier  "Videocard0"
 Driver      "mga"
 VendorName  "Videocard vendor"
 BoardName   "Matrox Graphics, Inc. MGA G550 AGP"
EndSection

Section "Screen"
 Identifier "Screen0"
 Device     "Videocard0"
 Monitor    "Monitor0"
 DefaultDepth     24
 SubSection "Display"
  Viewport   0 0
  Depth     16
  Modes    "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Viewport   0 0
  Depth     24
  Modes    "1600x1200" "1400x1050" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
 EndSubSection
EndSection

Section "DRI"
 Group        0
 Mode         0666
EndSection

-----------------------------------------------------------------------------------------------------

런레벨을 3으로 하여 부팅하면 텍스트모드로 부팅이 잘 됩니다.
하지만 그 상태에서 다시 startx 를 하니 역시나 다음과 같은 에러메시지가 나옵니다

---------------------------------------------
X Protocol Version 11, Revision 0, Release 7.0
Build Operating System:Linux 2.6.9-34.ELsmp i686Red Hat, Inc.
Current Operating System: Linux thjung.trao.re.kr 2.6.17-1.2174_FC5smp #1 SMP Tue Aug 8 16:00:39 EDT 2006 i686
Build Date: 30 June 2006
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Sat Aug 19 16:01:21 2006
(==) Using config file: "/etc/X11/xorg.conf"

The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
>                   Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
Could not init font path element unix/:7100, removing from list!

Fatal server error:
could not open default font 'fixed'
XIO:  fatal IO error 104 (Connection reset by peer) on X server ":0.0"
      after 0 requests (0 known processed) with 0 events remaining.
------------------------------------------------------------------------

이것 때문에 벌써 며칠을 고생하고 있네요.
도와주시면 정말 정말 감사하겠습니다.