Computer does not start after placed in hibernation (Kubuntu 7.04)

I am using Kubuntu 7.04 Linux 2.6.20-15-generic #2 SMP i686 GNU/Linux

Problem:

I select Log Out and then Hibernate. The computer then shows the screen savor and within a shot moment it shuts down. Then I turn on the PC. Computer begins to start up as it normally does. The Kubuntu splash screen shows (the one before Xorg loads) after a few moments the screen turns completely black and it stays like this. The computer is running, the fans are working, the monitor does not go into power save. The green light on the tower that indicates that the computer is on begins to blink. I try to press keys on the keyboard and mouse, nothing brings the PC back. I tap on the on/off button, nothing happens. Finally, in order to use the computer, I have to hold down the on/off button long enough for the computer to shut down. The reboot is successful.

######### xorg.conf ###############

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder3) Thu Nov 9 17:55:20 PST 2006

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf(5) manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
    Identifier "Default Layout"
    Screen "Default Screen" 0 0
    InputDevice "Generic Keyboard"
    InputDevice "Configured Mouse"
    InputDevice "stylus" "SendCoreEvents"
    InputDevice "cursor" "SendCoreEvents"
    InputDevice "eraser" "SendCoreEvents"
EndSection

Section "Files"

 # path to defoma fonts
    FontPath "/usr/share/fonts/X11/misc"
    FontPath "/usr/share/fonts/X11/cyrillic"
    FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
    FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
    FontPath "/usr/share/fonts/X11/Type1"
    FontPath "/usr/share/fonts/X11/100dpi"
    FontPath "/usr/share/fonts/X11/75dpi"
    FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
    Load "i2c"
    Load "bitmap"
    Load "ddc"
    Load "extmod"
    Load "freetype"
    Load "glx"
    Load "int10"
    Load "vbe"
EndSection

Section "InputDevice"
    Identifier "Generic Keyboard"
    Driver "kbd"
    Option "CoreKeyboard"
    Option "XkbRules" "xorg"
    Option "XkbModel" "pc105"
    Option "XkbLayout" "us"
    Option "XkbOptions" "lv3:ralt_switch"
EndSection

Section "InputDevice"
    Identifier "Configured Mouse"
    Driver "mouse"
    Option "CorePointer"
    Option "Device" "/dev/input/mice"
    Option "Protocol" "ImPS/2"
    Option "ZAxisMapping" "4 5"
    Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"

       # /dev/input/event
       # for USB
    Identifier "stylus"
    Driver "wacom"
    Option "Device" "/dev/wacom" # Change to
    Option "Type" "stylus"
    Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"

       # /dev/input/event
       # for USB
    Identifier "eraser"
    Driver "wacom"
    Option "Device" "/dev/wacom" # Change to
    Option "Type" "eraser"
    Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"

       # /dev/input/event
       # for USB
    Identifier "cursor"
    Driver "wacom"
    Option "Device" "/dev/wacom" # Change to
    Option "Type" "cursor"
    Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Monitor"
    Identifier "SyncMaster"
    Option "DPMS"
EndSection

Section "Device"
    Identifier "nVidia Corporation NV34 [GeForce FX 5500]"
    Driver "nvidia"
EndSection

Section "Screen"
    Identifier "Default Screen"
    Device "nVidia Corporation NV34 [GeForce FX 5500]"
    Monitor "SyncMaster"
    DefaultDepth 24
    Option "AddARGBGLXVisuals" "True"
    SubSection "Display"
        Depth 1
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 4
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 8
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 15
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 16
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 24
        Modes "1440x1440" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
    EndSubSection
EndSection

Kubuntu Hardware Database: 17ab77ba9773d71fe9f5bfa7d8587d78