Unable to upgrade to Jaunty beta

have you tried running "sudo update-manger -d"

hope it helps

Do the following:

1: Go to www.ubuntu.com
2: Click Download the Beta now
3: Upgrading from Ubuntu 8.10
To upgrade from Ubuntu 8.10 on a desktop system, press Alt+F2 and type in "update-manager -d" (without the quotes) into the command box. Update Manager should open up and tell you: New distribution release '9.04' is available. Click Upgrade and follow the on-screen instructions.

Hope it helps.
Peter

As I said, I've tried to use "update-manager -d" with no luck.
Sudo doesn't help either. And it shouldn't make big difference, actually.

Hope you will get a wise answer.
Peter

Using "sudo update-manager -d" should work. It will tell "Your system is up to date!" but on the up a button shall appear showing 9.04 update. Check images from http://www.ubuntugeek.com/upgrade-ubuntu-810-intrepid-ibex-to-ubuntu-904-jaunty-jackalope-beta.html

Well, Tahir, it should but it doesn't. If you read my messages you could see that.

Ok. I've found the solution.
Somewhat in the both directories ~/.update-manager-core and /var/lib/update-manager/ was old metainfo without information about Jaunty.

So I deleted both of them
> sudo rm -rf /var/lib/update-manager/
> rm -rf .update-manager-core

And now everything works as expected :)