Hi, two possible workarounds would be
a) if no valid mirror is found, check if nvidia-glx or the ati driver (and probably some other restricted driver) is installed and enable restricted. to lose some programs from multiverse or universe is not a big deal. An Xserver that refuses to boot is - for many people. b) if no valid mirror is found, search sources.list for the words restricted, universe, multiverse and enable the corresponding repositories. probably with some message box - roughly: "No official Ubuntu mirror has been found. To perform the upgrade we have to switch to an official mirror. Your configuration suggests that you are using components from the Universe, Multiverse or Restricted repositories. Please note that these are not officially supported." some combination - first a) then b) could also work. Kai -- restricted component lost from sources.list during upgrade https://launchpad.net/bugs/68467 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
