Upgrade Ubuntu 12.04 to 12.10 failed
- by pre-commit-hook
I've a problem. Upgrade failed after "Setting new software channels", when Calculating changes.
I tried error:
Not all updates can be installed
An unresolvable problem occurred while calculating the upgrade:
E:Unable to correct problems, you have held broken packages.
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 using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
Now i have 1580 packages to update and do not update. Partial system upgrade also fails in the first step. What next? Alternatively, to undo the changes? Thank's to help.