I have an old laptop as well, running hardy, and I see this problem still.
Sometimes it will stall while trying to update. Often it will successfully update, but then stall, for example, after clicking to redownload an updated package list.
Also it always works by doing sudo update-manager, or sudo apt-get. But that's cheating ;-)
I can see very briefly in the bottom panel of gnome "starting administrative application". But then, no password prompt will come and update manager will hang with the spinner.
I have an old laptop as well, running hardy, and I see this problem still.
Sometimes it will stall while trying to update. Often it will successfully update, but then stall, for example, after clicking to redownload an updated package list.
Also it always works by doing sudo update-manager, or sudo apt-get. But that's cheating ;-)
I can see very briefly in the bottom panel of gnome "starting administrative application". But then, no password prompt will come and update manager will hang with the spinner.