I got a new Nvidia PCI card (e-Geforce 6200) that installed without a hitch on Ubuntu, but I have run into serious problems with my Windows XP partition.
I turned off the computer, installed the card, and rebooted. The screen resolution was very poor, but I expected that.
I then used the driver disc to install the drivers. Everything went as expected, but when I hit the final "install" button, the computer asked if I was sure I wanted to install the drivers as they could seriously damage my system. I hit the continue button (who knows what Windows warnings to take seriously?) and the screen went blank, totally blacked out. I waited, but nothing happened.
Upon reboot, after the windows logo/startup screen, the screen went black again.
The PCI card is a replacement for an onboard intel card. I attempted to plug the monitor input into the intel card, but no dice. I'm guessing Ubuntu disabled the onboard card. I looked at the BIOS, but I am not familiar enough with BIOS to figure out where the Intel card is (de)activated.
I got my computer through Dell several years ago and they gave me 4 discs with it. One had the XP operating system, but it says it is a reinstallation CD and says nothing about safemode. I hesitate to use the reinstallation disc because I know Winodows has a tendency to overwrite GRUB and if Ubuntu became inaccessible, I would really be up a certain, filthy creek.
After some tinkering I have managed to mount my Windows partition, but it is read only.
Any help would be appreciated. I have googled, but it's clear the Windows community is much less likely to help each other out in a pinch.