Невозможно установить кучу пакетов, начиная с lib и заканчивая: i386 [на самом деле не дубликат] [дубликат]

Это определенно НЕ дубликат. «Возможный дубликат» я даже сказал, что попробовал в исходном вопросе. Что касается всего остального, то 16 комментариев и 1 ответ не сработали. Это явно не общее или общее решение, как другие вопросы, подобные моему.

     ian@ian:~$ sudo apt-get install skype
    [sudo] password for ian: 
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     skype : Depends: skype-bin
    E: Unable to correct problems, you have held broken packages.`

Я пробовал все решения для каждого вопроса, похожего на «у вас есть сломанные пакеты», включая те, что указаны в Как разрешить неудовлетворенные зависимости после добавления PPA? . Я очистил каждый ppa и не знаю, что теперь попробовать. Команда apt-mark showhold не дала никаких результатов. Мой список источников находится ниже. Спасибо за любую помощь.

# deb cdrom:[Ubuntu 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)]/ trusty main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty universe
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu trusty-security main restricted
deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted
deb http://security.ubuntu.com/ubuntu trusty-security universe
deb-src http://security.ubuntu.com/ubuntu trusty-security universe
deb http://security.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main

После ввода sudo apt-get install skype-bin skype libqtwebkit4 libqtgui4 я получил следующее:

ian@ian:~$ sudo apt-get install skype-bin skype libqtwebkit4 libqtgui4 libqtgui4:i386 libqtwebkit4:i386 libtiff5:i386 libjbig0:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libqtgui4 is already the newest version.
libqtwebkit4 is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libjbig0 : Breaks: libjbig0:i386 (!= 2.0-2+deb7u1) but 2.0-2ubuntu4.1 is to be installed
 libjbig0:i386 : Breaks: libjbig0 (!= 2.0-2ubuntu4.1) but 2.0-2+deb7u1 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.