Eu tenho o Ubuntu 14.04.2 instalado em um Lenovo S21e-20. Para obter coisas como rolagem com dois dedos ou suspender o touchpad durante a digitação, eu queria instalar xserver-xorg-input-synaptics , mas a instalação falha com duas dependências não atendidas devido a pacotes interrompidos (saídas de comando abaixo). Todos esses pacotes já devem estar instalados por padrão (minha instalação é nova, esta é a primeira coisa que faço neste sistema após a instalação do driver wi-fi).
Saída de sudo apt-get install xserver-xorg-input-synaptics :
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.
xserver-xorg-input-synaptics : Depends: xorg-input-abi-20
Depends: xserver-xorg-core (>= 2:1.14.99.902)
E: Unable to correct problems, you have held broken packages.
Saída de sudo apt-get install xorg-input-abi-20 :
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'xserver-xorg-core' instead of 'xorg-input-abi-20'
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.
libcheese-gtk23 : Depends: libclutter-gtk-1.0-0 (>= 0.91.8) but it is not going to be installed
Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
libcheese7 : Depends: libclutter-gst-2.0-0 (>= 0.10.0) but it is not going to be installed
Depends: gstreamer1.0-clutter but it is not going to be installed
libclutter-1.0-0 : Depends: libcogl-pango15 (>= 1.15.8) but it is not going to be installed
Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
A tentativa de instalar o xserver-xorg-core é anulada por um problema semelhante, ou seja, as mesmas dependências não atendidas.
Eu tentei sudo apt-get clean , sudo apt-get update , sudo dpkg --configure -a e sudo apt-get -f install , mas nem todos resolveram o problema. Nenhum pacote é exibido.
Tentando instalar as dependências do unment de xserver-xorg-core diretamente, mostra que elas já estão instaladas.
Como posso resolver isso?
Uma boa maneira de resolver esses problemas é usar aptitude .
sudo apt-get install aptitude
sudo aptitude update
sudo aptitude install xserver-xorg-input-synaptics
Agora, várias maneiras de resolver o problema serão propostas pelo aptitude:
Escolha a solução que desinstala menos pacotes. Anote quais pacotes foram removidos. Instale os pacotes novamente, se necessário.