upgrading 12.04 to 14.04 gives many problems

[Colin Law]

On 4 September 2014 13:33, Joep L. Blom <jlblom at neuroweave.nl> wrote:
> I upgraded eventually from 12.04 LTS to 14.04 LTS. However, contrary to
> upgrading from 10.04 to 12.04 (and 8.04 to 10.04) this upgrade process met
> with some serious problems, some of which haven resolved still.
> ...
> 3.    Next, and leading to my biggest problem - is the fact that many
> specific repositories were not upgraded but disabled.

Any upgrade cannot assume that any non-ubuntu repositories you enabled
will be compatible with the newer version of Ubuntu, therefore they
are disabled so that you can decide for yourself whether it is safe to
use them.

> in the some I could
> restore but the 2 most important to me, wine and Musescore are not
> reinstalled. Moreover, when I want to install wine from the software Center
> it refuses with the following error message:
> ¨Package dependencies cannot be resolved
> This error could be caused by required additional software packages which
> are missing or not installable. Furthermore there could be a conflict
> between software packages which are not allowed to be installed at the same
> time.¨
> That´s of course very  clear but I would like somebody to tell me what it
> means.

It means that something that is currently installed cannot be
installed at the same time as wine.
First remove anything that that is no longer required using
sudo apt-get autoremove

If that removes anything then try installing wine again.  If still no
joy then what do you see if you type, in a terminal,
sudo apt-get update
then, assuming that shows no errors
apt-cache policy wine

Copy/paste the result of the apt-cache command here.  Ctrl+Shift+C
will copy from the terminal, in case you were not aware of that.

Colin