I have a Linux machine (Fedora 14) with no screen attached. I view the graphics via VNC server. I had to adjust the system to use the Nvidia driver and tweak it for no screen.
First we need to install the Nvidia driver. Then, we need to adjust the X configuration for no screen and our preferred resolution.
for more details see: http://forums.fedoraforum.org/showthread.php?t=204752
1. Update the kernel:
su yum update kernel* reboot
2. Add rpmfusion to your repository.
su rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
3. Depending on your card add nvidia akmod to the kernel and the proper driver. for a Gforce 9500GT on my 64bit machine:
yum install akmod-nvidia-260.19.36-1.fc14.x86_64 xorg-x11-drv-nvidia-libs-260.19.36-1.fc14.x86_64
4. Edit the xorg.conf file. don't forget to adjust the Nvidia card for no screen attached by adding:
Option "ConnectedMonitor" "CRT"
to the device section and adjust the screen resolution under the Screen section:
Section "Device" Identifier "Card0" Driver "nvidia" Option "ConnectedMonitor" "CRT" EndSection Section "Screen" Identifier "Screen0" Device "Card0" Monitor "Monitor0" SubSection "Display" Viewport 0 0 Modes "1280x1024" EndSubSection EndSection