No GUI after booting

[Plasma_Snake]

Hi, I'm new here and its my first post too. I installed Ubuntu yesterday as SUSE was giving me trouble. After installing Ubuntu, I just fell in love with it, quick and peppy, recognized all my hardware in a jiffy, connecting to network was even faster than XP.
No troubles even while accessing my NTFS Window partitions.
Trouble in paradise began soon:
My screen's native res. is 1360x768 as it is a Samsung LCD TV.
It was available in the resolution options but as soon as I switched to it, my screen shifted to left. So I thought maybe installing GPU drivers would correct it so installed them by doing sh ati<blah blah>.run file from command prompt and it showed package being installed but my card still wasn't being detected. It is ATi HD4850. So I installed the drivers preferred by Synaptic and rebooted. Now after reboot my screen gives No signal error as it is getting the res. it does not support. How can I boot into the res. my screen does support? Or is editing the xorg.conf file through Text-terminal is the only solution?
I need ur help brothers.

[laceration]

You screwed things up messing with the drivers. Wouldn't be great if there was a program that found the best video driver for you and installed it too? There is! It's called envy. I am almost certain there will be instructions on how to use this from the command line if that's all you access to.
Here is the webpage, but there is probably plenty of info on these forums too:
http://www.albertomilone.com/nvidia_scripts1.html
(though the address says nvidia it supports ati too)

[Plasma_Snake]

I repaired the X Server through recovery console. Installed the ATi<crap>.run But now the aticonfig --initial -f command doesn't runs It gives following error:

rudra@rudra-testubuntu:/usr/bin$ aticonfig --initial
Uninitialised file found, configuring.
Using /etc/X11/xorg.conf
Saved back-up to /etc/X11/xorg.conf.original-0
aticonfig: Writing to '/etc/X11/xorg.conf' failed. Bad file descriptor.

BTW this is how my xorg.conf file looks like

rudra@rudra-testubuntu:~$ cat /etc/X11/xorg.conf
# xorg.conf (X.Org 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 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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 "Device"
	Identifier	"Configured Video Device"
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
EndSection

I do have ATI CCC under accessories now but clicking on it gives this error message:
http://www.mediafire.com/?mbzglgitkil
What to do?

[Plasma_Snake]

I followed the steps to install the drivers from Wiki and now my xorg.conf file is something like this

# xorg.conf (X.Org 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 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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     "aticonfig Layout"
	Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]-0"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]-0"
	Driver      "fglrx"
	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	Monitor    "aticonfig-Monitor[0]-0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Again, I'm getting no GUI after bootup. Tell me what fields to change?