答案1
从您的 $HOME 目录中删除任何具有以下形式的文件：.gtkrc 删除此类文件后，返回到您的外观设置并将您的主题更改为 Ambiance 或 Radiance，应用，然后转到您的首选主题。
答案2
请检查系统设置中 Ubuntu 的设置。
为了确保您运行正确的版本，您应该 + 安装 unity GUi + 更改设置 + 再次重置计算机以更改设置我猜你更改了一个帐户但检查了其他帐户
答案3
我试过这在 ubuntu 14.04 下。它会删除所有剩余的 kde 痕迹并重新安装 ubuntu-desktop。
sudo apt-get remove libkde3support4 k3b-data ntrack-module-libnl-0 libkrosscore4 libgpgme++2 libqapt2 oxygen-icon-theme libktexteditor4 libtaskmanager4abi5 kdenetwork-filesharing libkblog4 libchm1 plasma-widgets-addons libkimap4 plasma-netbook libkdeui5 libkdeclarative5 ttf-oxygen-font-family gtk3-engines-oxygen user-manager gpgsm libakonadi-kcal4 kdepim-kresources libruby1.9.1 plymouth-theme-kubuntu-logo libqt4-sql-mysql libmailtransport4 kde-telepathy-filetransfer-handler kde-zeroconf libkpimtextedit4 konsole liblastfm1 libqjson0 libtag-extras1 libkdecorations4abi1 libkdcraw23 libkpeople3 kdepimlibs-kio-plugins libqrencode3 libkparts4 libakonadiprotocolinternals1 libbalooxapian4 akonadi-server nepomuk-core-data libqca2 kubuntu-notification-helper kdemultimedia-kio-plugins libntrack0 kde-runtime-data cdparanoia libplasma-geolocation-interface4 quassel-data libkemoticons4 libmessagecomposer4 libweather-ion6 cdrdao libnepomukquery4a bluedevil libakonadi-notes4 libkmediaplayer4 libksieveui4 muon-discover libmicroblog4 libnetworkmanagerqt1 libqt4-qt3support libkcddb4 amarok-utils libmailcommon4 libktpcommoninternalsprivate7 libprocessui4a katepart libmusicbrainz5-0 libkwineffects1abi4 libreoffice-base libkdepim4 kaddressbook soprano-daemon libmessageviewer4 libkwinglesutils1 libsoprano4 libqapt2-runtime vcdimager libcln6 libvirtodbc0 libbaloopim4 okular libqca2-plugin-ossl libkonq5abi1 ubuntu-release-upgrader-qt python3-pyqt4 libkephal4abi1 libksba8 kdesudo libqoauth1 gnupg-agent libxerces-c3.1 kde-telepathy-data kdelibs5-plugins kcalc libqmobipocket1 systemsettings libkolabxml1 libsyndication4 libkjsapi4 libplasmagenericshell4 libksane0 libkprintutils4 knotes libkactivities6 libincidenceeditorsng4 lightdm-kde-greeter libreoffice-sdbc-firebird libiso9660-8 kubuntu-docs amarok gwenview libkcalcore4 virtuoso-opensource-6.1-common libkmbox4 virtuoso-opensource-6.1-bin libakonadi-contact4 libakonadi-socialutils4 plasma-widget-kimpanel kde-touchpad python3-dbus.mainloop.qt libqtscript4-gui python3-pykde4 plasma-widget-menubar libxcb-record0 libkcompactdisc4 kde-config-telepathy-accounts libkabc4 libkunitconversion4 okular-extra-backends plymouth-theme-kubuntu-text libcryptsetup4 ktorrent-data libknewstuff3-4 kde-workspace-kgreet-plugins kde-config-tablet gstreamer0.10-qapt akregator libxcb-xtest0 libnepomukutils4 odbcinst1debian2 kate libkmanagesieve4 libprocesscore4abi1 libqtscript4-network libksane-data ibus-qt4 ttf-dejavu-core libyaml-0-2 libkxmlrpcclient4 plasma-nm libpam-ck-connector libqgpgme1 print-manager libksignalplotter4 libkipi-data klipper libakonadi-kmime4 gtk2-engines-oxygen kde-telepathy-text-ui libkhtml5 libkcal4 libkmime4 ksysguardd kontact libmailimporter4 libakonadi-calendar4 libprison0 libsendlater4 libntrack-qt4-1 libsignon-qt1 libkldap4 libkfile4 kubuntu-settings-desktop libpoppler-qt4-4 kamera libbaloofiles4 libtelepathy-qt4-2 libnoteshared4 libakonadi-kde4 libreoffice-kde icoutils libgrantlee-gui0 socat libkdepimdbusinterfaces4 audiocd-kio libmodemmanagerqt1 liboath0 libmessagecore4 libqtglib-2.0-0 kde-baseapps-bin kubuntu-driver-manager libattica0.4 libmygpo-qt1 libkdesu5 libknewstuff2-4 dragonplayer libdlrestrictions1 libgps20 kde-telepathy-send-file libstreams0 libkidletime4 libkateinterfaces4 libknotifyconfig4 qapt-deb-installer libtemplateparser4 about-distro dolphin kinfocenter libplasmaclock4abi4 amarok-common kaccessible libqtscript4-uitools libxcb-composite0 libkcalutils4 libreoffice-java-common usb-creator-kde libkdecore5 kdelibs-bin plasma-desktop skanlite kmag kdegraphics-strigi-analyzer nepomuk-core-runtime plasma-scriptengine-javascript libperl4-corelibs-perl qapt-batch kde-wallpapers-default libloudmouth1-0 libqaccessibilityclient0 libktnef4 libflac++6 libnepomuk4 libkleo4 odbcinst pam-kwallet libstreamanalyzer0 libkdcraw-data docbook-xsl libkntlm4 libopenconnect2 software-properties-kde ktorrent krdc kmousetool kde-workspace-data libqtscript4-core partitionmanager cryptsetup libvcdinfo0 libboost-thread1.54.0 libkfbapi1 libxcb-damage0 ruby1.9.1 libkcmutils4 libkpimidentities4 libreoffice-style-oxygen k3b libkworkspace4abi2 colord-kde libkfilemetadata4 kde-style-oxygen libdebconf-kde0 libktorrent-l10n libpolkit-qt-1-1 libkolab0 libepub0 libkdgantt2-0 kubuntu-settings-netbook libqtscript4-xml kubuntu-web-shortcuts libtelepathy-logger-qt4-1 libkactivities-models1 libkpimutils4 freespacenotifier pinentry-qt4 kde-config-gtk-style libkgapi2-2 baloo libkubuntu0 python3-sip kmix libkio5 libxml2-utils ksnapshot libktorrent5 libakonadi-kabc4 libpimcommon4 kde-config-whoopsie libkpgp4 khelpcenter4 oxygen-cursor-theme shared-desktop-ontologies libkexiv2-data libplasma3 muon-updater kde-config-pimactivity kde-telepathy libaccounts-qt1 kdepasswd libqtscript4-sql libkexiv2-11 libkontactinterface4 libmessagelist4 kde-telepathy-integration-module kdepim-runtime libkscreen1 && sudo apt-get install ubuntu-desktop