Ubuntu 12.04 - problem with nvidia drivers

I installed 12.04 LTS recently. I installed Nvidia drivers running the following in the terminal :

$ sudo apt-get purge nvidia-*
$ sudo apt-get update
$ sudo apt-get install nvidia-current-updates

I also tried installing via the RUN file : link.

After executing the RUN file and rebooting, my screen resolution is stuck at 640 X 480. I have a FHD screen.

I have run sudo apt-get purge nvidia-* again, and now want to ask how can I ask fix this problem. Right now I have nothing relevant to Nvidia on my system.

Running sudo dpkg --get-selections | grep nvidia gives me an empty result.

My screen resolution is still 640 X 480.

(there are so many answers out there on this topic and commands in various order, that I had to ask it again, sorry if its exactly a duplicate)

Edit

I tried uninstalling using the run file, and it asked me if I want to bring back the backedup x settings. I clicked yes. After uninstall & reboot, the desktop just had a wallpaper.

Then I ran :

sudo apt-get install nvidia-current-updates

I rebooted again. Right now desktop looks normal.

If I run

sudo dpkg --get-selections | grep nvidia

I get

nvidia-304-updates              install
nvidia-current-updates          install
nvidia-settings                 install

My system settings still shows Graphics : unknown.

How do I tell if my display drivers are configured correctly ?

I can also run :

 $ nvidia-settings

and a window titled Nvidia X Server Settings pops up. Does this mean everything is ok , despite settings telling me unknown graphics ?

Edit 2

I tried installing mesa-utils, now instead of showing unknown graphics, it shows it as blank :P .. is that better ?

Edit 3

I think my nvidia driver is still no configured properly. Referring this answer

When I run :

glxinfo | grep vendor

I get

Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Error: couldn't find RGB GLX visual or fbconfig
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".

Expected output :

server glx vendor string: NVIDIA Corporation
client glx vendor string: NVIDIA Corporation
OpenGL vendor string: NVIDIA Corporation

What to do ?

Edit 4

I also tried

$ lshw -c video
WARNING: you should run this program as super-user.
*-display UNCLAIMED
   description: VGA compatible controller
   product: GK208M [GeForce GT 730M]
   vendor: NVIDIA Corporation
   physical id: 0
   bus info: pci@0000:02:00.0
   version: a1
   width: 64 bits
   clock: 33MHz
   capabilities: vga_controller bus_master cap_list
   configuration: latency=0
   resources: memory:f0000000-f0ffffff memory:c0000000-cfffffff
   memory:d0000000-   d1ffffff ioport:3000(size=128)
   *-display
   description: VGA compatible controller
   product: 4th Gen Core Processor Integrated Graphics Controller
   vendor: Intel Corporation
   physical id: 2
   bus info: pci@0000:00:02.0
   version: 06
   width: 64 bits
   clock: 33MHz
   capabilities: vga_controller bus_master cap_list rom
   configuration: driver=i915 latency=0
   resources: irq:49 memory:f1000000-f13fffff memory:e0000000
   -efffffff ioport:4000(size=64)
   WARNING: output may be incomplete or inaccurate, you should run
   this program as super-user.

Does this indicate everything is in order ?

Edit 5

Here's my additional driver window :

Should I go ahead & enable 304 ?

Edit 6

After running

 sudo apt-get install nvidia-current

as per one of the suggestions, the additional driver windows changed to :

Also :

$ sudo dpkg --get-selections | grep nvidia
nvidia-304                  install
nvidia-304-updates          install
nvidia-current              install
nvidia-current-updates      install
nvidia-settings             install

Graphics settings is still blank.

Running $nvidia-settings shows me :

What is left to do ??

Edit 7

With no one replying ... I am installing the last entry in the list, and deactivating 304. Now I will try sudo nvidia-xconfig & a reboot. fingers crossed ..