我最近在我的 Ubuntu 14.04 上安装了 Okular。
问题是当我打开 pdf 文件时，okular 给出错误“找不到能够处理传递的文档的插件”。
当我通过终端运行 Okular 时，这是我收到的消息。
admin@me:~$ okular ex01.pdf
okular(14100)/kdeui (KIconLoader): Error: standard icon theme "oxygen" not found!
okular(14100)/kdeui (KIconLoader): Error: standard icon theme "oxygen" not found!
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14100) KPixmapSequence::frameSize: No frame loaded
okular(14100): No ksycoca4 database available!
okular(14100)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType "okular/Generator" not found
okular(14100)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(14100)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(14100)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(14100)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(14100)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
okular(14100): No ksycoca4 database available!
okular(14100)/kdecore (trader) mimeTypeSycocaServiceOffers: KMimeTypeTrader: mimeType "application/pdf" not found
okular(14100): No ksycoca4 database available!
okular(14100)/kdecore (trader): KMimeTypeTrader: couldn't find service type "okular/Generator"
Please ensure that the .desktop file for it is installed; then run kbuildsycoca4.
okular(14100)/okular (app) Okular::Document::openDocument: No plugin for mimetype '"application/pdf"'.
okular(14100): Couldn't start knotify from knotify4.desktop: "KLauncher could not be reached via D-Bus. Error when calling start_service_by_desktop_path:
The name org.kde.klauncher was not provided by any .service files
"
okular(14100)/kdeui (KNotification) KNotification::slotReceivedIdError: Error while contacting notify daemon "The name org.kde.knotify was not provided by any .service files"
X Error: BadWindow (invalid Window parameter) 3
Major opcode: 20 (X_GetProperty)
Resource id: 0x2a0002e
okular(14110) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14110) KPixmapSequence::frameSize: No frame loaded
okular(14110) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14110) KPixmapSequence::frameSize: No frame loaded
okular(14110) KPixmapSequence::Private::loadSequence: Invalid pixmap specified.
okular(14110) KPixmapSequence::frameSize: No frame loaded
X Error: BadWindow (invalid Window parameter) 3
Major opcode: 20 (X_GetProperty)
Resource id: 0x2a0001d
X Error: BadWindow (invalid Window parameter) 3
Major opcode: 20 (X_GetProperty)
Resource id: 0x2a0001d
如果您能提供任何解决此问题的建议，我将不胜感激。非常感谢 :)
答案1
这确实很烦人，但是：
sudo apt-get install kdelibs5-plugins kdelibs5-data oxygen-icon-theme
答案2
我遇到了同样的错误信息。就我的情况而言奥克拉尔使用 进行安装sudo，并且 KDE 依赖项安装到 下的主文件夹中.kde，但以 root 作为所有者和组。
我通过运行来改变：
sudo chown -R youruser .kde
sudo chgrp -R youruser .kde
然后一切正常。
答案3
根据 Linux Mint 发行说明中的“KDE 应用程序问题”部分
如果您在使用 KDE 应用程序（Okular、Gwenview、KStars 等）时遇到问题，请运行以下命令：
apt install kdelibs-bin kdelibs5-data kdelibs5-plugins
注意：这些问题不会影响 KDE 版本。KDE 4.14 中的回归阻止这些应用程序在 KDE 之外正常运行。
答案4
打开 Synaptic 软件包管理器，然后搜索kde-core-devel
安装 版本下的所有软件包4:4.14.2-0ubuntu1~ubuntu14.04~ppa1。然后搜索oxygen，并安装氧气图标主题。