this means no repos enabled?
just do the following check for the repositories in the file /etc/apt/sources.list and uncomment universe,multiverse repos and save.
the sane way is to use terminal and editors like vi and nano
First back up ur /etc/apt/sources.list by Applications>Accessories>Terminal
Code:
~$sudo cp /etc/apt/sources.list /etc/apt/sources.list.bk
Now
try these:
press ALT+F2,U''ll get a run dialog in GNOME.inside run dialog enter below commands as it is and run(press enter)
Code:
gksudo gedit /etc/apt/sources.list
when prompted give ur user password.
Now u have something opened in gedit editor.clear the page except the line:
Code:
deb cdrom:[Ubuntu 7.04 _Feisty Fawn_ - Alpha i386 (20070228.1)]/ feisty main restricted
Then copy below codes and save this in editor and exit.
Code:
# # If you get GPG errors with this sources.list, locate the GPG key in this file
# # and run these commands (where KEY is replaced with that key)
# #
# # gpg --keyserver hkp://subkeys.pgp.net --recv-keys KEY
# # gpg --export --armor KEY | sudo apt-key add -
#Ubuntu Security
deb http://archive.ubuntu.com/ubuntu/ feisty-security main restricted
deb-src http://archive.ubuntu.com/ubuntu/ feisty-security main restricted
deb http://archive.ubuntu.com/ubuntu/ feisty-security universe
deb-src http://archive.ubuntu.com/ubuntu/ feisty-security universe
deb http://archive.ubuntu.com/ubuntu/ feisty-security multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty-security multiverse
# # Ubuntu supported packages
# # GPG key: 437D05B5
deb http://archive.ubuntu.com/ubuntu/ feisty main restricted
deb-src http://archive.ubuntu.com/ubuntu/ feisty main restricted
deb http://archive.ubuntu.com/ubuntu/ feisty-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu/ feisty-updates main restricted
#
# # Ubuntu community supported packages
# # GPG key: 437D05B5
deb http://archive.ubuntu.com/ubuntu/ feisty universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty universe multiverse
deb http://archive.ubuntu.com/ubuntu/ feisty-updates universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty-updates universe multiverse
# # Ubuntu backports project
# # GPG key: 437D05B5
deb http://archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
#### Proposed Multiverse ####
deb http://archive.ubuntu.com/ubuntu/ feisty-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ feisty-proposed main restricted universe multiverse
#### Canonical Commercial ####
deb http://archive.canonical.com/ubuntu feisty-commercial main
Now just apt-get update and try installing nvidia drivers.
U can independently look and understand what all these mess are by running:
menu System>Administration>Synaptic package manager