即使在Ubuntu 14.10中安装了Gedit，也无法正常工作

当我gedit在终端中输入内容时，我得到：

daniel@daniel-pc:~$ gedit
The program 'gedit' is currently not installed. You can install it by typing:
sudo apt-get install gedit

所以我这样做：

daniel@daniel-pc:~$ sudo apt-get install gedit
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:
 gedit : Depends: gedit-common (< 3.11) but 3.12.2-0ubuntu1~trusty1 is to be installed
E: Unable to correct problems, you have held broken packages.
daniel@daniel-pc:~$ 

背景：

我遵循了http://howtoubuntu.org/things-to-do-after-installing-ubuntu-14-10-utopic-unicorn中看到的所有代码，但是在我注意到许多基本程序（例如getedit和nautilus）具有我用gnome样式代替了统一样式，然后从GUI软件和Updates中删除了PPA。

我还编辑sudo apt-get install edubuntu-desktop了edubuntu中的程序，但是在更改主题和背景后，我按照此处的说明进行操作：如何从软件包中删除所有程序？，从返回的列表中选择不需要的程序。我跑

daniel@daniel-pc:~$ apt-cache show gedit
Package: gedit
Priority: optional
Section: gnome
Installed-Size: 2615
Maintainer: Ubuntu Desktop Team <[email protected]>
Original-Maintainer: Debian GNOME Maintainers [email protected]
Architecture: amd64
Version: 3.10.4-0ubuntu6
Depends: libatk1.0-0 (>= 1.12.4), libc6 (>= 2.14), libcairo2 (>= 1.2.4), libenchant1c2a (>= 1.6.0), libgdk-pixbuf2.0-0 (>= 2.22.0), libgirepository-1.0-1 (>= 0.9.3), libglib2.0-0 (>= 2.38), libgtk-3-0 (>= 3.10), libgtksourceview-3.0-1 (>= 3.10.1), libpango-1.0-0 (>= 1.14.0), libpeas-1.0-0 (>= 1.1.0), libx11-6, libxml2 (>= 2.7.4), libzeitgeist-2.0-0 (>= 0.9.9), gedit-common (>= 3.10), gedit-common (<< 3.11), gsettings-desktop-schemas, python3-gi (>= 3.0), python-gi-cairo (>= 3.0), gir1.2-peas-1.0, iso-codes
Recommends: gir1.2-gtksource-3.0, zenity, yelp
Suggests: gedit-plugins
Breaks: gedit-plugins (<< 2.91)
Filename: pool/main/g/gedit/gedit_3.10.4-0ubuntu6_amd64.deb
Size: 483208
MD5sum: 3e4508090c23d68053212ab02cb0287c
SHA1: 9f38aafddfa21cd2743b863b1783710a5360d0d2
SHA256: d43073382e1b9894abecfcd8fe6a04e2c771f6aabe0891e666a8f59ee2107283
Description-en: official text editor of the GNOME desktop environment
 gedit is a text editor which supports most standard editor features,
 extending this basic functionality with other features not usually
 found in simple text editors. gedit is a graphical application which
 supports editing multiple text files in one window (known sometimes as
 tabs or MDI).
 .
 gedit fully supports international text through its use of the Unicode
 UTF-8 encoding in edited files. Its core feature set includes syntax
 highlighting of source code, auto indentation and printing and print preview
 support.
 .
 gedit is also extensible through its plugin system, which currently
 includes support for spell checking, comparing files, viewing CVS
 ChangeLogs, and adjusting indentation levels.
Description-md5: 5091aaf6659e6bf7ca9b32695a59f9cd
Homepage: http://www.gnome.org/projects/gedit/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 9m
Task: ubuntu-desktop, ubuntu-usb, edubuntu-desktop, edubuntu-usb, ubuntustudio-desktop, ubuntu-gnome-desktop, ubuntukylin-desktop

daniel@daniel-pc:~$

因此，它说已安装gedit，但未安装。我试图通过`sudo apt-get remove gedit ='和版本号来卸载gedit的Gnome版本，但是我不记得了。

编辑：

daniel@daniel-pc:~$ apt-cache policy gedit-common
gedit-common:
  Installed: 3.12.2-0ubuntu1~trusty1
  Candidate: 3.12.2-0ubuntu1~trusty1
  Version table:
 *** 3.12.2-0ubuntu1~trusty1 0
        100 /var/lib/dpkg/status
     3.10.4-0ubuntu6 0
        500 http://us.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
daniel@daniel-pc:~$

编辑：现在的nautulus图像，即卸载之前gedit的外观：链接在菜单栏中查看。看起来像侏儒，不是默认的统一。我也想为所有受此影响的程序提供一个通用的解决方案，而不仅仅是gedit和nautilus（尽管我不知道是否有）。