我安装了 11.04 和 Gnome 3，一切运行正常，直到我尝试运行更新管理器。现在我无法更新任何软件包。类似的问题已发布一段时间，但没有提出解决方案
编辑
输出自sudo apt-get update && sudo apt-get upgrade
Ign http://extras.ubuntu.com natty InRelease
Ign http://ppa.launchpad.net natty InRelease
Ign http://us.archive.ubuntu.com natty InRelease
Ign http://us.archive.ubuntu.com natty-updates InRelease
Ign http://security.ubuntu.com natty-security InRelease
Hit http://extras.ubuntu.com natty Release.gpg
Hit http://ppa.launchpad.net natty Release.gpg
Hit http://us.archive.ubuntu.com natty Release.gpg
Hit http://security.ubuntu.com natty-security Release.gpg
Hit http://extras.ubuntu.com natty Release
Hit http://ppa.launchpad.net natty Release
Hit http://us.archive.ubuntu.com natty-updates Release.gpg
Hit http://security.ubuntu.com natty-security Release
Hit http://extras.ubuntu.com natty/main Sources
Hit http://us.archive.ubuntu.com natty Release
Hit http://ppa.launchpad.net natty/main Sources
Hit http://security.ubuntu.com natty-security/main Sources
Hit http://extras.ubuntu.com natty/main i386 Packages
Ign http://extras.ubuntu.com natty/main TranslationIndex
Hit http://us.archive.ubuntu.com natty-updates Release
Hit http://ppa.launchpad.net natty/main i386 Packages
Ign http://ppa.launchpad.net natty/main TranslationIndex
Hit http://security.ubuntu.com natty-security/restricted Sources
Hit http://security.ubuntu.com natty-security/universe Sources
Hit http://security.ubuntu.com natty-security/multiverse Sources
Hit http://security.ubuntu.com natty-security/main i386 Packages
Hit http://security.ubuntu.com natty-security/restricted i386 Packages
Hit http://us.archive.ubuntu.com natty/main Sources
Hit http://us.archive.ubuntu.com natty/restricted Sources
Hit http://us.archive.ubuntu.com natty/universe Sources
Hit http://us.archive.ubuntu.com natty/multiverse Sources
Hit http://us.archive.ubuntu.com natty/main i386 Packages
Hit http://security.ubuntu.com natty-security/universe i386 Packages
Hit http://security.ubuntu.com natty-security/multiverse i386 Packages
Ign http://security.ubuntu.com natty-security/main TranslationIndex
Ign http://security.ubuntu.com natty-security/multiverse TranslationIndex
Ign http://security.ubuntu.com natty-security/restricted TranslationIndex
Ign http://security.ubuntu.com natty-security/universe TranslationIndex
Hit http://us.archive.ubuntu.com natty/restricted i386 Packages
Hit http://us.archive.ubuntu.com natty/universe i386 Packages
Hit http://us.archive.ubuntu.com natty/multiverse i386 Packages
Ign http://us.archive.ubuntu.com natty/main TranslationIndex
Ign http://us.archive.ubuntu.com natty/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty/universe TranslationIndex
Hit http://us.archive.ubuntu.com natty-updates/main Sources
Hit http://us.archive.ubuntu.com natty-updates/restricted Sources
Hit http://us.archive.ubuntu.com natty-updates/universe Sources
Hit http://us.archive.ubuntu.com natty-updates/multiverse Sources
Hit http://us.archive.ubuntu.com natty-updates/main i386 Packages
Hit http://us.archive.ubuntu.com natty-updates/restricted i386 Packages
Hit http://us.archive.ubuntu.com natty-updates/universe i386 Packages
Hit http://us.archive.ubuntu.com natty-updates/multiverse i386 Packages
Ign http://us.archive.ubuntu.com natty-updates/main TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/universe TranslationIndex
Ign http://extras.ubuntu.com natty/main Translation-en_US
Ign http://ppa.launchpad.net natty/main Translation-en_US
Ign http://extras.ubuntu.com natty/main Translation-en
Ign http://ppa.launchpad.net natty/main Translation-en
Ign http://security.ubuntu.com natty-security/main Translation-en_US
Ign http://security.ubuntu.com natty-security/main Translation-en
Ign http://security.ubuntu.com natty-security/multiverse Translation-en_US
Ign http://security.ubuntu.com natty-security/multiverse Translation-en
Ign http://security.ubuntu.com natty-security/restricted Translation-en_US
Ign http://security.ubuntu.com natty-security/restricted Translation-en
Ign http://security.ubuntu.com natty-security/universe Translation-en_US
Ign http://security.ubuntu.com natty-security/universe Translation-en
Ign http://us.archive.ubuntu.com natty/main Translation-en_US
Ign http://us.archive.ubuntu.com natty/main Translation-en
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty/restricted Translation-en
Ign http://us.archive.ubuntu.com natty/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty/universe Translation-en
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
brasero brasero-cdrkit brasero-common empathy empathy-common eog evince
evince-common gedit gedit-common gnome-disk-utility gnome-keyring
gnome-media gnome-shell gnome-system-monitor gnome-terminal
gnome-terminal-data gnome-themes-selected gucharmap gvfs gvfs-backends
gvfs-fuse libcanberra-pulse libcanberra0 libgcr0 libgdu-gtk0
libgnome-keyring0 libgtk-vnc-1.0-0 libgucharmap7 light-themes
linux-generic-pae linux-headers-generic-pae linux-image-generic-pae
nautilus-sendto-empathy seahorse totem totem-common totem-mozilla
totem-plugins vinagre yelp zenity
0 upgraded, 0 newly installed, 0 to remove and 42 not upgraded.
编辑3
sudo apt-get install [package]安装完每个被阻止的软件包（通过 ）后，一切似乎都正常了。那么为什么我必须重新安装所有东西呢？我猜想这与 gnome3 有关，因为每个软件包都是通过其 repo 安装的。
答案1
我发现有时包管理器无法应对特定 PPA 请求更新的更改程度。
例如，管理器开始处理一个文件，但放弃声明错误的依赖关系——而没有进一步分析 PPA 中的后续包或包是否会满足该依赖关系。
在这些情况下，您应该执行以下操作 - 在终端中运行
sudo apt-get update && sudo apt-get upgrade
这将为您提供无法安装的软件包列表。
逐一浏览列表并尝试安装它，即
sudo apt-get install <package name>
完成此操作后，重复更新/升级命令并重复其请求的其余软件包/新软件包。您可能需要执行此操作几次，直到安装所有软件包。