>From Gusty 7.10 (all upgrade installed) to Hardy 8.04 AMD 800mhz i386
had no action after it got to checking database. Detail switch ghosted.
Switched to command line
sudo aptitude install update-manager-core
sudo do-release-upgrade
.....
Calculating the changes
Could not calculate the upgrade
A unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug against the
'update-manager' package and include the files in
/var/log/dist-upgrade/ in the bugreport.
Restoring original system state
Aborting
Reading package lists: Donem gutsy-backports/universe Packages: 95
Reading state information: Done
Reading state information: Done
Reading state information: Done
** Attachment added: "apt.log"
http://launchpadlibrarian.net/14023059/apt.log
--
package update-manager failed to install or upgrade
https://bugs.launchpad.net/bugs/223864
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