bueno, pues aqui tengo el sources.list:
# deb cdrom:[Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081029.5)]/ intrepid main restricted
# See
http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb
http://archive.ubuntu.com/ubuntu/ intrepid main restricted multiverse
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb
http://archive.ubuntu.com/ubuntu/ intrepid-updates main restricted multiverse
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb
http://archive.ubuntu.com/ubuntu/ intrepid universe
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid universe
deb
http://archive.ubuntu.com/ubuntu/ intrepid-updates universe
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid-updates universe
## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb
http://es.archive.ubuntu.com/ubuntu/ intrepid-backports main restricted universe multiverse
# deb-src
http://es.archive.ubuntu.com/ubuntu/ intrepid-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository. This software is not part of Ubuntu, but is
## offered by Canonical and the respective vendors as a service to Ubuntu
## users.
deb
http://archive.canonical.com/ubuntu intrepid partner
deb-src
http://archive.canonical.com/ubuntu intrepid partner
deb
http://archive.ubuntu.com/ubuntu/ intrepid-security main restricted
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid-security main restricted
deb
http://archive.ubuntu.com/ubuntu/ intrepid-security universe
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid-security universe
deb
http://archive.ubuntu.com/ubuntu/ intrepid-security multiverse
deb-src
http://archive.ubuntu.com/ubuntu/ intrepid-security multiverse
como no tengo ni idea, no se si esta bien o mal el archivo
de todos modos, probare con las sugerencias que me dieron en el post anterior, e incluso considero la posibilidad de cambiar a open suse, pues un amigo que controla bastante de linux me ha dicho que ha tenido las 2 distros y que da mejor rendimiento el opensuse 11, asi que habra que meditarlo detenidamente. GRacias de nuevo a todos por vuestras respuestas