Ubuntu, ATI VGA card + 2 monitors

Some time ago I was playing with Ubuntu distibutive trying to make my two monitors work in Big Desktop mode. There were ATI graphical card Radeon X300 and two identical monitors connected to it.
From my first quick google search I realized I need something called proprietary driver – driver developed by device vendor, NOT open one – included by default in Linux distibutive. For ATI card it is called – fglrx
It can be the latest version like described here
http://wiki.cchtml.com/index.php/Ubuntu_Jaunty_Installation_Guide#The_Ubuntu_way_to_install_the_Proprietary_Drivers
or it can be installed just from the repository

sudo apt-get install xorg-driver-fglrx

Additional util EnvyNG may be used
http://vasir.net/blog/ubuntu/set-up-dual-monitors-with-ubuntu-804/

So I followed with diffirent instructions to install fglrx and what was my surprise when after reboot X.org server failed to start. That is because only new ATI cards can use the fglrx driver.
So go ahead with instructions from
http://ubuntuforums.org/archive/index.php/t-1171926.html
using opensource ATI driver not fglrx. It require X.org config file to be modified to support two monitors and Big-Desktop mode
Now it seems to be better!

But what surprised me more is the standard util in Gnome environment called “Configuration of display settings” that do all the stuff with two monitors.

What a shame to me spent almost two days playing with different drivers instead of using simple util.

My Xorg.conf looks like:

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
SubSection "Display"
Virtual 2880 900
EndSubSection
EndSection

Section "Device"
Identifier "Configured Video Device"
EndSection

Pay attention to Virtual resolution there 2880 is double value from 1440 – width of one monitor

Other usedful links:
http://ubuntuforums.org/showthread.php?t=861608
https://help.ubuntu.com/community/BinaryDriverHowto/ATI
https://help.ubuntu.com/community/RadeonDriver