Você deve relatar essas coisas ao proprietário do PPA. Ele não está separando arquivos específicos que não são de arquitetura ou definindo que o shotwell quebra / tem conflitos com o pacote shotwell-common.
A maneira correta de fazer isso é remover o pacote shotwell-common do repositório e depois instalar o do ppa:
sudo apt-get purge shotwell-common
sudo apt-get install shotwell
Isso evitará dores de cabeça durante a atualização de pacotes.
➜ ~ apt-cache policy shotwell-common
shotwell-common:
Installed: 0.14.1-3
Candidate: 0.14.1-3
Version table:
*** 0.14.1-3 0
500 http://ftp.us.debian.org/debian/ testing/main i386 Packages
100 /var/lib/dpkg/status
➜ ~ sudo dpkg -i Downloads/shotwell*
[sudo] password for braiam:
(Reading database ... 188756 files and directories currently installed.)
Preparing to unpack .../shotwell_0.15.1-1~saucy1_i386.deb ...
Unpacking shotwell (0.15.1-1~saucy1) over (0.14.1-3) ...
dpkg: error processing archive Downloads/shotwell_0.15.1-1~saucy1_i386.deb (--install):
trying to overwrite '/usr/share/icons/hicolor/24x24/apps/shotwell.svg', which is also in package shotwell-common 0.14.1-3
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for menu (2.1.46) ...
Errors were encountered while processing:
Downloads/shotwell_0.15.1-1~saucy1_i386.deb
➜ ~ sudo apt-get --reinstall install shotwell-common=0.14.1-3 shotwell=0.14.1-3
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 2 reinstalled, 0 to remove and 12 not upgraded.
Need to get 3,901 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://ftp.us.debian.org/debian/ testing/main shotwell-common all 0.14.1-3 [1,965 kB]
Get:2 http://ftp.us.debian.org/debian/ testing/main shotwell i386 0.14.1-3 [1,936 kB]
Fetched 3,901 kB in 24s (157 kB/s)
(Reading database ... 188756 files and directories currently installed.)
Preparing to unpack .../shotwell-common_0.14.1-3_all.deb ...
Unpacking shotwell-common (0.14.1-3) over (0.14.1-3) ...
Preparing to unpack .../shotwell_0.14.1-3_i386.deb ...
Unpacking shotwell (0.14.1-3) over (0.14.1-3) ...
Processing triggers for desktop-file-utils (0.22-1) ...
Processing triggers for gnome-menus (3.8.0-2) ...
Processing triggers for mime-support (3.54) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for libglib2.0-0:i386 (2.36.4-1) ...
Processing triggers for man-db (2.6.5-3) ...
Processing triggers for menu (2.1.46) ...
Setting up shotwell-common (0.14.1-3) ...
Setting up shotwell (0.14.1-3) ...
Processing triggers for menu (2.1.46) ...
➜ ~ sudo apt-get remove shotwell-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libgee2 libgexiv2-2 libraw9
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
shotwell shotwell-common
0 upgraded, 0 newly installed, 2 to remove and 12 not upgraded.
After this operation, 12.1 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 188756 files and directories currently installed.)
Removing shotwell (0.14.1-3) ...
Removing shotwell-common (0.14.1-3) ...
Processing triggers for menu (2.1.46) ...
Processing triggers for man-db (2.6.5-3) ...
Processing triggers for libglib2.0-0:i386 (2.36.4-1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for desktop-file-utils (0.22-1) ...
Processing triggers for gnome-menus (3.8.0-2) ...
Processing triggers for mime-support (3.54) ...
➜ ~ sudo dpkg -i Downloads/shotwell*.deb
Selecting previously unselected package shotwell.
(Reading database ... 188477 files and directories currently installed.)
Preparing to unpack .../shotwell_0.15.1-1~saucy1_i386.deb ...
Unpacking shotwell (0.15.1-1~saucy1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for man-db (2.6.5-3) ...
Processing triggers for libglib2.0-0:i386 (2.36.4-1) ...
Processing triggers for desktop-file-utils (0.22-1) ...
Processing triggers for gnome-menus (3.8.0-2) ...
Processing triggers for mime-support (3.54) ...
Processing triggers for menu (2.1.46) ...
➜ ~