系统带的有XTerm还有UTXerm还有个LXTerminal，一样的东西为什么搞三个？强迫症犯了，就去软件中心找到了XTerm删除了。然后看到应用更新好了，点击了"重启"，启动后仅仅左上角一个下划线闪了两下，其它全黑，黑了三秒左右，Lubuntu的启动界面出来了一下，然后就无限黑屏了。我重启了好几次也没有用，昨天晚上睡觉前，我让它黑了一夜，今天上午起床后一直在查找解决办法，现在实在走投无路了才发帖。系统用了一段时间了，舍不得重装，望各位大大给小的指点一下，拜托了！

按 Ctrl+Alt+F1-F6 看能否进入 tty1-6
若能进入，检查网络连接是否畅通
若畅通，执行以下指令

把回应的网址贴上来

输了您的第一行代码后出来好多东西，我不会向上滚屏，第二个代码后就出来这个网址了paste.ubuntu.com/15702481/

感谢您的回复，网址依次为
http://paste.ubuntu.com/15702481/
http://paste.ubuntu.com/15702626/
http://paste.ubuntu.com/15702643/

通过上下箭头键，找到你删除xterm的命令，改成安装，看看成不？

我在软件管理中心删了，还没有用命令行删过软件呢

1. 在正常運作中的 Ubuntu 14.04 amd64 執行下述指令
sudo apt-get -s purge xterm
下列软件包将被【卸载】：
lubuntu-desktop* xterm*
# -s 表示模擬 不會真正移除 但是可以顯示 可能會移除哪些依賴於 xterm 的套件

2. 按下 ctrl + alt + F1
登入 tty1
如果有必要先關閉 tty7 (抱歉 資料不夠 無法幫你寫出指令如何關閉 tty7)
sudo apt-get install --reinstall lubuntu-desktop* xterm*
sudo reboot

3. 以上適用於 Ubuntu 14.04
Ubuntu 14.10 及 以後的版本 可能需要微調

观看 log 文件，只卸载了 xterm 一个包。因此猜测 与卸载 xterm 无关


不过可能与数分钟之前 2016-04-08 22:19:07 的操作有关
试试

实在不行，就重新安装桌面
sudo apt-get install lubuntu-desktop

可以只安桌面哇，资料不会丢是吧？
实在不行了我试试
非常感谢

安装桌面怎么会删除你的资料？就跟安装普通程序一样的，哪怕你重装系统，你的资料都不会损毁，只要你不格式化home分区。
如果你安装过arch，你就知道，刚安装好的系统就一个黑乎乎的终端而已，你必须自己安装桌面，声音驱动，显卡驱动等等东西。

大神！
成了！出来两个警告！桌面出来了！！
请收下我的膝盖！！

用词典查了下，内容是系统出现了问题，是不是要报告

看到你之前的图，可能由于某个虚包被删除 导致大量的包变为 autoremoveable
执行把结果全部复制贴上来
注意 不要漏掉 -s
-s 表示模拟执行，不会真正 autoremove

不好意思，我现在才收工。

结果有点长，麻烦您了
x@T:~$ sudo apt-get -s autoremove
[sudo] password for x:
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
下列软件包将被【卸载】：
accountsservice-ubuntu-schemas accountsservice-ubuntu-touch-schemas acl apg
bluez cheese-common cups-pk-helper espeak-data gir1.2-gnomebluetooth-1.0
gir1.2-packagekitglib-1.0 gkbd-capplet gnome-control-center-shared-data
gnome-menus gnome-session-bin gsettings-ubuntu-touch-schemas
gstreamer0.10-nice gstreamer0.10-plugins-good gstreamer1.0-clutter
libaccounts-qt5-1 libandroid-properties1 libboost-iostreams1.54.0
libboost-program-options1.54.0 libboost-serialization1.54.0
libboost-system1.54.0 libcapnp-0.4.0 libcheese-gtk23 libcheese7
libclutter-gst-2.0-0 libclutter-gtk-1.0-0 libcontent-hub0 libdbus-cpp2
libdbusmenu-qt5 libdee-qt5-3 libespeak1 libestools2.1 libexo-1-0
libexo-common libexo-helpers libfarstream-0.1-0 libgflags2
libgnomekbd-common libgnomekbd8 libgoogle-glog0 libgsettings-qt1
libgssdp-1.0-3 libgupnp-1.0-4 libgupnp-igd-1.0-4 libhardware2 libhud-client2
libhud2 libhybris libhybris-common1 libieee1284-3 libjsoncpp0 libmbim-glib0
libmeanwhile1 libmedia1 libmediascanner-2.0-0 libmirclient7
libmirclientplatform-mesa libmirplatform libmirprotobuf0 libnice10
libofono-qt1 libpackagekit-glib2-16 libpgm-5.1-0 libpocketsphinx1
libprocess-cpp1 libpurple0 libqdjango-db0 libqmi-glib0 libqt5core5a
libqt5dbus5 libqt5network5 libqt5organizer5 libqt5positioning5
libqt5qml-graphicaleffects libqt5qml5 libqt5sensors5 libqt5sql5
libqt5sql5-sqlite libqt5systeminfo5 libqt5test5 libqt5xml5
libqt5xmlpatterns5 libsane libsane-common libsignon-extension1
libsignon-plugins-common1 libsignon-qt5-1 libsonic0 libsphinxbase1
libsystemd-journal0 libsystemsettings1 libthumbnailer0 libtimezonemap1
libubuntu-application-api1 libubuntu-download-manager-client0
libubuntu-download-manager-common0 libubuntu-download-manager-priv0
libubuntu-location-service0 libubuntu-platform-hardware-api1
libubuntuoneauth-2.0-0 libunity-action-qt1 libunity-api0 libunity-scopes1
libunityvoice1 libunwind8 libutempter0 libwhoopsie-preferences0
libxcb-icccm4 libxcb-image0 libxcb-render-util0 libxcb-xkb1
libxkbcommon-x11-0 libzephyr4 libzmq3 libzmqpp3 mediascanner2.0 mousetweaks
obexd-client ofono packagekit packagekit-backend-aptcc packagekit-tools
pidgin-data powerd python-cups python-cupshelpers python-gnomekeyring
python-libxml2 python-requests python-smbc python-support python3-gnupg
python3-packagekit python3-xdg qtdeclarative5-dee-plugin
qtdeclarative5-folderlistmodel-plugin qtdeclarative5-gsettings1.0
qtdeclarative5-systeminfo-plugin
qtdeclarative5-ubuntu-settings-components-assets
qtdeclarative5-unity-action-plugin qtdeclarative5-unity-notifications-plugin
qtdeclarative5-xmllistmodel-plugin signon-plugin-password signond
sphinx-voxforge-hmm-en sphinx-voxforge-lm-en sqlite3 stardict-common
stardict-gnome stardict-plugin stardict-plugin-espeak
stardict-plugin-festival suru-icon-theme system-config-printer-common
system-image-common system-image-dbus thumbnailer-service
ubuntu-download-manager ubuntu-mobile-icons ubuntu-system-service
ubuntu-touch-sounds ubuntu-ui-toolkit-theme ubuntuone-client-data
ubuntuone-credentials-common unity-scope-mediascanner2 unity-scope-scopes
unity-voice-service usermetricsservice whoopsie-preferences xbitmaps
升级了 0 个软件包，新安装了 0 个软件包，要卸载 173 个软件包，有 4 个软件包未被升级。
Remv accountsservice-ubuntu-touch-schemas [0.0.1+14.04.20140401-0ubuntu1]
Remv accountsservice-ubuntu-schemas [0.0.1+14.04.20140401-0ubuntu1]
Remv libsane [1.0.23-3ubuntu3.1]
Remv acl [2.2.52-1]
Remv apg [2.2.3.dfsg.1-2ubuntu1]
Remv bluez [4.101-0ubuntu13.1]
Remv libcheese-gtk23 [3.10.2-0ubuntu2]
Remv libcheese7 [3.10.2-0ubuntu2]
Remv cheese-common [3.10.2-0ubuntu2]
Remv cups-pk-helper [0.2.5-0ubuntu1]
Remv stardict-plugin-espeak [3.0.1-9.2]
Remv libespeak1 [1.47.11-1ubuntu1]
Remv espeak-data [1.47.11-1ubuntu1]
Remv gir1.2-gnomebluetooth-1.0 [3.8.2.1-0ubuntu4.2]
Remv gir1.2-packagekitglib-1.0 [0.8.12-1ubuntu5]
Remv gkbd-capplet [3.6.0-0ubuntu2]
Remv gnome-control-center-shared-data [1:3.6.3-0ubuntu56.1]
Remv gnome-menus [3.10.1-0ubuntu2]
Remv gnome-session-bin [3.9.90-0ubuntu12.1]
Remv gsettings-ubuntu-touch-schemas [0.0.1+14.04.20140401-0ubuntu1]
Remv libpurple0 [1:2.10.9-0ubuntu3.2]
Remv libfarstream-0.1-0 [0.1.2-1ubuntu3]
Remv gstreamer0.10-nice [0.1.4-1]
Remv gstreamer0.10-plugins-good [0.10.31-3+nmu1ubuntu5]
Remv gstreamer1.0-clutter [2.0.8-1build1]
Remv libubuntuoneauth-2.0-0 [14.04+14.04.20140415]
Remv libaccounts-qt5-1 [1.11+14.04.20140410.1-0ubuntu1]
Remv powerd [0.14+14.04.20140415-0ubuntu1]
Remv libubuntu-application-api1 [0.20+14.04.20140411-0ubuntu1]
Remv libubuntu-location-service0 [0.0.2+14.04.20140307-0ubuntu1]
Remv libubuntu-platform-hardware-api1 [0.20+14.04.20140411-0ubuntu1]
Remv libhybris-common1 [0.1.0+git20131207+e452e83-0ubuntu12] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libandroid-properties1 [0.1.0+git20131207+e452e83-0ubuntu12] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv unity-scope-scopes [0.1+14.04.20140404-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv unity-scope-mediascanner2 [0.2+14.04.20140404-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libunity-scopes1 [0.4.2+14.04.20140408-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libdbus-cpp2 [2.0.0+14.04.20140326-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libprocess-cpp1 [1.0.0+14.04.20140328-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libboost-iostreams1.54.0 [1.54.0-4ubuntu3.1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libboost-program-options1.54.0 [1.54.0-4ubuntu3.1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libboost-serialization1.54.0 [1.54.0-4ubuntu3.1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libmirclient7 [0.1.8+14.04.20140411-0ubuntu1] [libmedia1:i386 libmirclientplatform-mesa:i386 libhybris:i386 libhardware2:i386 ]
Remv libmirclientplatform-mesa [0.1.8+14.04.20140411-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libboost-system1.54.0 [1.54.0-4ubuntu3.1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libcapnp-0.4.0 [0.4.0-1ubuntu2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libclutter-gst-2.0-0 [2.0.8-1build1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libclutter-gtk-1.0-0 [1.4.4-3ubuntu2.2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libcontent-hub0 [0.0+14.04.20140415-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libdbusmenu-qt5 [0.9.3+14.04.20140314-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libhud-client2 [14.04+14.04.20140604-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv qtdeclarative5-dee-plugin [3.3+14.04.20140317-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libdee-qt5-3 [3.3+14.04.20140317-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv stardict-plugin-festival [3.0.1-9.2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libestools2.1 [1:2.1~release-6] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libexo-1-0 [0.10.2-3ubuntu1.14.04.2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libexo-common [0.10.2-3ubuntu1.14.04.2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libexo-helpers [0.10.2-3ubuntu1.14.04.2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv system-image-dbus [2.2-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv system-image-common [2.2-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv ubuntu-download-manager [0.3+14.04.20140321-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libubuntu-download-manager-priv0 [0.3+14.04.20140321-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgoogle-glog0 [0.3.3-1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgflags2 [2.0-1.1ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgnomekbd8 [3.6.0-0ubuntu2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgnomekbd-common [3.6.0-0ubuntu2] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv qtdeclarative5-gsettings1.0 [0.1+14.04.20140408-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgsettings-qt1 [0.1+14.04.20140408-0ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libnice10 [0.1.4-1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgupnp-igd-1.0-4 [0.2.2-1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgupnp-1.0-4 [0.20.10-1ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libgssdp-1.0-3 [0.14.7-1ubuntu1] [libmedia1:i386 libhybris:i386 libhardware2:i386 ]
Remv libhybris [0.1.0+git20131207+e452e83-0ubuntu12] [libmedia1:i386 libhardware2:i386 ]
Remv libhardware2 [0.1.0+git20131207+e452e83-0ubuntu12] [libmedia1:i386 ]
Remv qtdeclarative5-unity-action-plugin [1.1.0+14.04.20140304-0ubuntu1] [libmedia1:i386 ]
Remv libunity-action-qt1 [1.1.0+14.04.20140304-0ubuntu1] [libmedia1:i386 ]
Remv libhud2 [14.04+14.04.20140604-0ubuntu1] [libmedia1:i386 ]
Remv libieee1284-3 [0.2.11-12] [libmedia1:i386 ]
Remv libjsoncpp0 [0.6.0~rc2-3ubuntu1] [libmedia1:i386 ]
Remv libmbim-glib0 [1.6.0-2ubuntu0.1] [libmedia1:i386 ]
Remv libmeanwhile1 [1.0.2-4.1ubuntu1] [libmedia1:i386 ]
Remv libmedia1 [0.1.0+git20131207+e452e83-0ubuntu12]
Remv mediascanner2.0 [0.100+14.04.20140403-0ubuntu1]
Remv libmediascanner-2.0-0 [0.100+14.04.20140403-0ubuntu1]
Remv libmirplatform [0.1.8+14.04.20140411-0ubuntu1]
Remv libmirprotobuf0 [0.1.8+14.04.20140411-0ubuntu1]
Remv libofono-qt1 [1.5+git20120419+bcf0c04-0ubuntu6]
Remv packagekit-tools [0.8.12-1ubuntu5]
Remv packagekit [0.8.12-1ubuntu5]
Remv libpackagekit-glib2-16 [0.8.12-1ubuntu5]
Remv libzmqpp3 [3.2.0-0ubuntu3]
Remv libzmq3 [4.0.4+dfsg-2]
Remv libpgm-5.1-0 [5.1.118-1~dfsg-0.1ubuntu3]
Remv libunityvoice1 [0.1+14.04.20140304-0ubuntu1]
Remv unity-voice-service [0.1+14.04.20140304-0ubuntu1]
Remv libpocketsphinx1 [0.8.0+real-0ubuntu6]
Remv usermetricsservice [1.1.1+14.04.20140305-0ubuntu2]
Remv libqdjango-db0 [0.4.0-1ubuntu2]
Remv libqmi-glib0 [1.4.0-1]
Remv qtdeclarative5-xmllistmodel-plugin [5.2.1-3ubuntu15.1]
Remv qtdeclarative5-folderlistmodel-plugin [5.2.1-3ubuntu15.1]
Remv qtdeclarative5-unity-notifications-plugin [0.1.1+14.04.20140402-0ubuntu1]
Remv libqt5qml5 [5.2.1-3ubuntu15.1] [libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 ]
Remv libqt5xml5 [5.2.1+dfsg-1ubuntu14.3] [libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 ]
Remv signon-plugin-password [8.56+14.04.20140307-0ubuntu2] [libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 ]
Remv signond [8.56+14.04.20140307-0ubuntu2] [libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 ]
Remv libqt5sql5-sqlite [5.2.1+dfsg-1ubuntu14.3] [libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 ]
Remv libqt5core5a [5.2.1+dfsg-1ubuntu14.3] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5network5:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 qtdeclarative5-systeminfo-plugin:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5systeminfo5:i386 libqt5positioning5:i386 libubuntu-download-manager-client0:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 libqt5xmlpatterns5:i386 ]
Remv qtdeclarative5-systeminfo-plugin [5.0~git20130712-0ubuntu4] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5network5:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5systeminfo5:i386 libqt5positioning5:i386 libubuntu-download-manager-client0:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 libqt5xmlpatterns5:i386 ]
Remv libqt5systeminfo5 [5.0~git20130712-0ubuntu4] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5network5:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libubuntu-download-manager-client0:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 libqt5xmlpatterns5:i386 ]
Remv libqt5xmlpatterns5 [5.2.1-3] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5network5:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libubuntu-download-manager-client0:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 ]
Remv libqt5network5 [5.2.1+dfsg-1ubuntu14.3] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libubuntu-download-manager-client0:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 ]
Remv libubuntu-download-manager-client0 [0.3+14.04.20140321-0ubuntu1] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libqt5dbus5:i386 libqt5sensors5:i386 libubuntu-download-manager-common0:i386 ]
Remv libubuntu-download-manager-common0 [0.3+14.04.20140321-0ubuntu1] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libqt5dbus5:i386 libqt5sensors5:i386 ]
Remv libqt5dbus5 [5.2.1+dfsg-1ubuntu14.3] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5organizer5:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libqt5sensors5:i386 ]
Remv libqt5organizer5 [5.0~git20140203~e0c5eebe-0ubuntu2] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5positioning5:i386 libqt5sensors5:i386 ]
Remv libqt5positioning5 [5.2.1-1ubuntu2] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libqt5qml-graphicaleffects:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5sensors5:i386 ]
Remv libqt5qml-graphicaleffects [5.2.1-1] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 libqt5sensors5:i386 ]
Remv libqt5sensors5 [5.2.1+dfsg-2ubuntu2] [libqt5sql5:i386 libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 ]
Remv libqt5sql5 [5.2.1+dfsg-1ubuntu14.3] [libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-extension1:i386 libqt5test5:i386 libsignon-plugins-common1:i386 ]
Remv libqt5test5 [5.2.1+dfsg-1ubuntu14.3] [libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-extension1:i386 libsignon-plugins-common1:i386 ]
Remv libsane-common [1.0.23-3ubuntu3.1] [libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-extension1:i386 libsignon-plugins-common1:i386 ]
Remv libsignon-extension1 [8.56+14.04.20140307-0ubuntu2] [libsignon-qt5-1:i386 libsystemsettings1:i386 libsignon-plugins-common1:i386 ]
Remv libsignon-plugins-common1 [8.56+14.04.20140307-0ubuntu2] [libsignon-qt5-1:i386 libsystemsettings1:i386 ]
Remv libsignon-qt5-1 [8.56+14.04.20140307-0ubuntu2] [libsystemsettings1:i386 ]
Remv libsonic0 [0.1.18-0ubuntu1] [libsystemsettings1:i386 ]
Remv libsphinxbase1 [0.8-0ubuntu10] [libsystemsettings1:i386 ]
Remv libsystemd-journal0 [204-5ubuntu20.18] [libsystemsettings1:i386 ]
Remv libsystemsettings1 [0.1+14.04.20140411-0ubuntu2]
Remv thumbnailer-service [1.1+14.04.20150205-0ubuntu1]
Remv libthumbnailer0 [1.1+14.04.20150205-0ubuntu1]
Remv libtimezonemap1 [0.4.1]
Remv libunity-api0 [7.80.6+14.04.20140402-0ubuntu1]
Remv libunwind8 [1.1-2.2ubuntu3]
Remv libutempter0 [1.1.5-4build1]
Remv whoopsie-preferences [0.12]
Remv libwhoopsie-preferences0 [0.12]
Remv libxcb-icccm4 [0.4.1-1ubuntu1]
Remv libxcb-image0 [0.3.9-1ubuntu2]
Remv libxcb-render-util0 [0.3.8-1.1ubuntu1]
Remv libxkbcommon-x11-0 [0.4.1-0ubuntu1]
Remv libxcb-xkb1 [1.10-2ubuntu1]
Remv libzephyr4 [3.1.2-1]
Remv mousetweaks [3.8.0-2]
Remv obexd-client [0.46-1ubuntu7]
Remv ofono [1.12.bzr6858+14.04.20140318-0ubuntu1]
Remv packagekit-backend-aptcc [0.8.12-1ubuntu5]
Remv pidgin-data [1:2.10.9-0ubuntu3.2]
Remv system-config-printer-common [1.4.3+20140219-0ubuntu2.6]
Remv python-cups [1.9.66-0ubuntu2]
Remv python-cupshelpers [1.4.3+20140219-0ubuntu2.6]
Remv python-gnomekeyring [2.32.0+dfsg-3]
Remv python-libxml2 [2.9.1+dfsg1-3ubuntu4.7]
Remv python-requests [2.2.1-1ubuntu0.3]
Remv python-smbc [1.0.14.1-0ubuntu2]
Remv python-support [1.0.15]
Remv python3-gnupg [0.3.6-1]
Remv python3-packagekit [0.8.12-1ubuntu5]
Remv python3-xdg [0.25-4]
Remv qtdeclarative5-ubuntu-settings-components-assets [0.1+14.04.20140306-0ubuntu1]
Remv sphinx-voxforge-hmm-en [0.1.1~daily20130301-0ubuntu1]
Remv sphinx-voxforge-lm-en [0.1.1~daily20130301-0ubuntu1]
Remv sqlite3 [3.8.2-1ubuntu2.1]
Remv stardict-plugin [3.0.1-9.2]
Remv stardict-gnome [3.0.1-9.2]
Remv stardict-common [3.0.1-9.2]
Remv suru-icon-theme [14.04+14.04.20140410-0ubuntu1]
Remv ubuntu-mobile-icons [14.04+14.04.20140410-0ubuntu1]
Remv ubuntu-system-service [0.2.5build1]
Remv ubuntu-touch-sounds [13.10.1]
Remv ubuntu-ui-toolkit-theme [0.1.46+14.04.20140408.1-0ubuntu1]
Remv ubuntuone-credentials-common [14.04+14.04.20140415]
Remv ubuntuone-client-data [13.05-0ubuntu1]
Remv xbitmaps [1.1.1-2]
x@T:~$

有两种可能的方案
1 - 按楼上 @poloshiao @谢宝良 说的，重装 lubuntu-desktop。缺点是会把你之前卸掉的“累赘”都装回来
2 - 用 apt-mark 将上面列出的软件包都标记为手动安装。缺点是洁癖有点不能忍

你的 lubuntu-desktop 早在四月一日之前就被意外移除了，因此上面的log中看不到。如果你查看 /var/log/apt/history.*.log.gz，应该会看到 lubuntu-desktop 被移除的记录。
也正因为如此，卸载 xterm 时并没有像 @poloshiao 提到的那样一并移除 lubuntu-desktop