garbled screen with out of sync colors

[Nils Kassube]

Ashutosh Sharma wrote:
> 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 would recommend you boot to recovery mode [1] and at the menu select 
the "xfix" option (somewhere at the end of the menu). When the menu 
comes back, select the option "resume". That should restore the original 
video driver which may not have all features for your card but at least 
it works.

> I am having ATI Raedon 3450 - 256 MB Display card

Sorry, I can't help you with your ATI card.


Nils

[1] <https://wiki.ubuntu.com/RecoveryMode>