Nvidia graphic's card drivers

[debiani386]

gerald.jean at videotron.ca wrote:
> Hello there,
>
> I'm on Gutsy Gibbon.  A couple days ago I was browsing: System > 
> Preferences > Appearance > Visual effects menu, it was set to "No 
> effects".  Unfortunately, for me, I changed the settings to "Extra"; 
> when I closed the panel Ubuntu said it needed to install some Nvidia 
> graphic's drivers to get the desired effect; I clicked OK and the 
> drivers were installed.  The computer then needed to be rebooted, when 
> it started Ubuntu told me that those Nvidia drivers were not supported 
> by Ubuntu, I clicked "go ahead anyway" (very bad idea!), or something 
> similar and all the effects worked fine.
>
> Problems started when I tried to shut the computer down, as soon as I 
> hit the «stop» button the screen goes black and a small, moving, white 
> rectangle appears saying "Unsupported frequencies"???  Worst yet, the 
> computer never shuts down, I have to hold the switch for several 
> seconds for it to shut down?
>
> Needless to say I changed back the above settings to "No effects", but 
> to no avail, the damage is done now.
>
> What do I need to do in order to get the previous behaviour back, i.e. 
> the computer shutting down when asked to?  Do I need to uninstall 
> those drivers, if yes how do I find them and how do I go about 
> uninstalling?  Anything else?
>
> Thanks for your support,
>
> Gérald Jean
well have you tried unloading ubuntus nvidia driver and installing the 
driver from nvidias website?

--cj