garbled screen with out of sync colors

[Ashutosh Sharma]

I am getting garbled screen with out of sync colored screen.
1)I have installed ubuntu Server 9.0.4 edition on my Dell Studio 15 laptop
with dual boot(with Windows Vista 64 bit)
2)It was working fine. Later i did apt-get ubuntu-desktop(not sure about the
command-but it worked fine)
3)It was also working fine but it changed my boot screen, now i directly go
to GNome Desktop rather than the shell prompt for login.
4)It was working fine but i wanted to set up my graphics card which is ATI
Raedon 3400 -256 MB card. After that as and when i reboot-i get a garbled
screen with out of sync colors. Please go thru the screen shot.The first
screen is a snapshot when it reboots.
5) As i cannot enter anything-i tried "Ctrl+Alt+F7" to get terminal login.
But i get the second screen.
I tried recovering using server install CD but no success.

Is the only way out is to reformat and re-install?

Can somebody provide me kernel parameters and how to enter at GRUB boot
loader so that i can go to the shell prompt and do the needfull

Any help is highly appreciated.


But when i tried booting with the ubuntu desktop 9.0.4 CD it went inside
without any problems.
And then i collected all the logs that i am sending with this email.

I am having ATI Raedon 3450 - 256 MB Display card

-- 
With best Regards:
Ashutosh Sharma
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