Aptidão mostrando apenas links em vez de descrições completas de pacotes

Question

Eu instalei recentemente o Ubuntu 15.10, e agora o Aptitude está mostrando apenas um link para a página inicial do pacote, em vez de uma descrição completa que ele usou para mostrar na minha instalação anterior do 14.04. O que posso fazer para obter essas descrições?

A saída de apt-cache policy

stefan@desktop:~$ apt-cache policy 
Paketdateien:
 100 /var/lib/dpkg/status
     release a=now
 500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu/ wily/main Translation-en
 500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu/ wily/main i386 Packages
     release v=15.10,o=LP-PPA-graphics-drivers,a=wily,n=wily,l=Proprietary GPU Drivers,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu/ wily/main amd64 Packages
     release v=15.10,o=LP-PPA-graphics-drivers,a=wily,n=wily,l=Proprietary GPU Drivers,c=main
     origin ppa.launchpad.net
 500 http://security.ubuntu.com/ubuntu/ wily-security/universe Translation-en
 500 http://security.ubuntu.com/ubuntu/ wily-security/restricted Translation-en
 500 http://security.ubuntu.com/ubuntu/ wily-security/multiverse Translation-en
 500 http://security.ubuntu.com/ubuntu/ wily-security/main Translation-en
 500 http://security.ubuntu.com/ubuntu/ wily-security/multiverse i386 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=multiverse
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/universe i386 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=universe
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/restricted i386 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=restricted
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/main i386 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=main
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/multiverse amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=multiverse
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/universe amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=universe
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/restricted amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=restricted
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ wily-security/main amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-security,n=wily,l=Ubuntu,c=main
     origin security.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-backports/universe Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-backports/restricted Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-backports/multiverse Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-backports/main Translation-en
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/multiverse i386 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/universe i386 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/restricted i386 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/main i386 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/multiverse amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/universe amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/restricted amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 100 http://de.archive.ubuntu.com/ubuntu/ wily-backports/main amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-backports,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/universe Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/restricted Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/multiverse Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/main Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/multiverse i386 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/universe i386 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/restricted i386 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/main i386 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/multiverse amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/universe amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/restricted amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily-updates/main amd64 Packages
     release v=15.10,o=Ubuntu,a=wily-updates,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/universe Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily/universe Translation-de
 500 http://de.archive.ubuntu.com/ubuntu/ wily/restricted Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily/restricted Translation-de
 500 http://de.archive.ubuntu.com/ubuntu/ wily/multiverse Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily/multiverse Translation-de
 500 http://de.archive.ubuntu.com/ubuntu/ wily/main Translation-en
 500 http://de.archive.ubuntu.com/ubuntu/ wily/main Translation-de
 500 http://de.archive.ubuntu.com/ubuntu/ wily/multiverse i386 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/universe i386 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/restricted i386 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/main i386 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/multiverse amd64 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=multiverse
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/universe amd64 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=universe
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/restricted amd64 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=restricted
     origin de.archive.ubuntu.com
 500 http://de.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
     release v=15.10,o=Ubuntu,a=wily,n=wily,l=Ubuntu,c=main
     origin de.archive.ubuntu.com
Mit Pinning verwaltete Pakete:
stefan@desktop:~$ 

E a saída de cat /etc/apt/sources.list |grep -v \#

stefan@desktop:~$ cat /etc/apt/sources.list |grep -v \#

deb http://de.archive.ubuntu.com/ubuntu/ wily main restricted
deb-src http://de.archive.ubuntu.com/ubuntu/ wily main restricted

deb http://de.archive.ubuntu.com/ubuntu/ wily-updates main restricted
deb-src http://de.archive.ubuntu.com/ubuntu/ wily-updates main restricted

deb http://de.archive.ubuntu.com/ubuntu/ wily universe
deb-src http://de.archive.ubuntu.com/ubuntu/ wily universe
deb http://de.archive.ubuntu.com/ubuntu/ wily-updates universe
deb-src http://de.archive.ubuntu.com/ubuntu/ wily-updates universe

deb http://de.archive.ubuntu.com/ubuntu/ wily multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ wily multiverse
deb http://de.archive.ubuntu.com/ubuntu/ wily-updates multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ wily-updates multiverse

deb http://de.archive.ubuntu.com/ubuntu/ wily-backports main restricted universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ wily-backports main restricted universe multiverse

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

    

Answer 1

Tentando uma resposta um pouco insatisfatória, começando com 3 observações:

1. você não está sozinho
2. a versão do aptitude mudou de 0.6.11 (no Ubuntu 15.04) para 0.7.3
3. /usr/share/aptitude/NEWS lista as alterações entre as duas versões e, para a 0.7.2, lemos em "alterações internas"

  

Melhore a recuperação de informações do pacote fonte com o (próximo) APT 1.1.
  Obrigado a David Kalnischkies pelo conselho de sugestão e implementação.

     

As informações sobre o pacote de origem e a versão estarão no cache binário e estarão disponíveis por meio do VerIterator ( ver.SourcePkgName() e        ver.SourceVerStr() ) e é muito mais rápido do que analisar o registro do pacote.

O que me chamou a atenção foi "estará no cache binário" como algo que será verdade para o APT 1.1, mas a versão APT agora é apenas 1.01 no Ubuntu 15.10

Assim, parece que será necessária alguma paciência até que você encontre as descrições completas novamente.