550 series problems display vs Linux (Ubuntu)

Question

I am having a lenovo Y 550 laptop with nVidia GeForce 240 M graphics card in it and I am using Ubuntu 9.10. I installed the graphics card driver version 190.42 from nvidia web site. I had a problem in the beginning. There in my laptop it showed 6 mini screen with same content at the same time. On searching I found out that in X configuration file we need to place -> Option "ModeValidation" "NoTotalsizecheck" in the Device section. I had done that and after reboot I found that the 6 mini screen problem gone. But after logout/stand by/switching to text terminal the screen gets flickery/fuzzy. I am not able to read/see anything clearly. I have found out so many queries about this problem in net; but sadly didn't find a solution. I am attaching my x configuration file with this. Thanking you in advance.
/etc/X11/xorg.conf
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder63) Tue Oct 20 21:00:15 PDT 2009
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
Option "ModeValidation" "NoTotalSizeCheck"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0

Answer 1

xclock throws an error.
oracle@linux-ubuntu-desktop:~/database$ xclock
Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using '192.168.1.128:0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Unknown Source)
at java.awt.Window.init(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at oracle.ewt.popup.PopupFrame.<init>(Unknown Source)
at oracle.ewt.lwAWT.BufferedFrame.<init>(Unknown Source)
at oracle.sysman.oio.oioc.OiocOneClickInstaller.<init>(OiocOneClickInstaller.java:378)
at oracle.sysman.oio.oioc.OiocOneClickInstaller.main(OiocOneClickInstaller.java:2091)
directly loged onto the linux.not using putty etc..