I am unable to change the display resolution or detect my monitor

To help you better we need some additional informations about your hardware so please open a Terminal from the menu
Applications → Accessories → Terminal and type or better copy and paste the row below form here into terminal then press enter:

lspci

Select copy and paste the terminal result here.

Thank you

bob@BobSony:~$ lspci
00:00.0 Host bridge: Intel Corporation 82845 845 [Brookdale] Chipset Host Bridge (rev 04)
00:01.0 PCI bridge: Intel Corporation 82845 845 [Brookdale] Chipset AGP Bridge (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 05)
00:1f.0 ISA bridge: Intel Corporation 82801BA ISA Bridge (LPC) (rev 05)
00:1f.1 IDE interface: Intel Corporation 82801BA IDE U100 Controller (rev 05)
00:1f.2 USB Controller: Intel Corporation 82801BA/BAM USB Controller #1 (rev 05)
00:1f.3 SMBus: Intel Corporation 82801BA/BAM SMBus Controller (rev 05)
00:1f.4 USB Controller: Intel Corporation 82801BA/BAM USB Controller #1 (rev 05)
00:1f.5 Multimedia audio controller: Intel Corporation 82801BA/BAM AC'97 Audio Controller (rev 05)
01:00.0 VGA compatible controller: nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 64 Pro] (rev 15)
02:09.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 61)
02:09.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 61)
02:09.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 63)
02:09.3 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306 Fire II IEEE 1394 OHCI Link Layer Controller (rev 46)
02:0b.0 Communication controller: Agere Systems LT WinModem (rev 02)
02:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
02:0e.0 FireWire (IEEE 1394): Texas Instruments TSB12LV26 IEEE-1394 Controller (Link)
bob@BobSony:~$ B

Please try to install and use the envyng-qt to get recommended nvidia driver help.

Please first enable the universe repository:

Open System → Administration → Software sources → [ Tab Ubuntu software ]
enable "Community Maintained open source software (universe)"
Close and confirm the repository reload.

Then open a Terminal from the menu Applications → Accessories → Terminal and type:

sudo aptitude update
sudo apt-get dist-upgrade
sudo aptitude install envyng-qt

give your user password when requested, you don't see nothing when you type it, then press enter.

Then you can run envy from menu Applications→System Tools → EnvyNG

Hth

After installed the nvidia driver please search the into the menus the item to manage your video settings...

Hth

Please don't change the original question otherwise the follow answers might have no sense.
Please always send post at the end of this thread.

Thank you

Hello, I chaged my CPU with 9.04, upgrade to 9.10 and later Installed 10.10 Ubuntu version, all that looking for the best monitor resolution, the same problem plenty of people are reporting how to change if no other option is detected by installed versions

Ray