After hearing about some of the features in 12.10, I decided to upgrade my Ubuntu from 12.04 LTS to the newer 12.10. However, when I try to upgrade it, I start the update manager, like always, and I start the distro upgrade, just like I do every time there's a new version, but at the end of the "Setting new software channels" stage, it fails, saying:
Could not calculate the upgrade
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.
What should I do? I understand that I have some sort of "broken" package on my system, but how do I identify and remove the problem?
Note: At the start of the "Setting new software channels" stage, I was presented with this:
Third party sources disabled
Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager.
** UPDATE **
Well, it was a real pain, but I actually re-downloaded the 12.04 iso, burned it to a CD (my computer has decided to stop booting from USB,) re-installed 12.04, and immediately upgraded to 12.10. I then went to sleep. When I got up in the morning, it seemed to be stalled on
I checked my internet, but, aside from the occasional packet bursts that keep my computer connected to my Wi-Fi, there was no usage. I think that it has stalled somehow.
Okay, it was about an hour from the time I saw the error till the time I edited this. It's been about an hour since. 2 hours stalling, plus any time that it has been doing this before I checked it - this is a serious problem. (NOTE: it already passed the "point of no return," where it said that there will be no going back after this step has been completed.)
Here's a screenshot of what it's doing: http://imgur.com/nN6kf