Okular tidak dapat membaca file pdf

Saya baru saja menginstal Okular pada Ubuntu 14.04 saya.

Masalahnya adalah ketika saya membuka file pdf, okular memberi saya kesalahan "Tidak dapat menemukan plugin yang dapat menangani dokumen yang sedang lewat."

Ketika saya menjalankan Okular oleh Terminal, ini adalah pesan yang saya dapatkan.

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

Saya akan sangat menghargai atas saran untuk menyelesaikan masalah ini. Terima kasih banyak :)

Ini cukup mengganggu, tetapi:

sudo apt-get install kdelibs5-plugins kdelibs5-data oxygen-icon-theme

Saya memiliki pesan kesalahan yang sama. Dalam kasus saya, Okular diinstal dengan sudo, dan dependensi KDE diinstal ke folder home di bawah .kde, tetapi dengan root sebagai pemilik dan grup.

Saya berubah dengan menjalankan:

sudo chown -R youruser .kde    
sudo chgrp -R youruser .kde

maka itu bekerja normal.

Menurut catatan rilis mint linux di bagian "Masalah dengan Aplikasi KDE"

Jika Anda mengalami masalah dengan aplikasi KDE (Okular, Gwenview, KStars..etc) jalankan perintah berikut:

apt install kdelibs-bin kdelibs5-data kdelibs5-plugins

Catatan: Masalah-masalah ini tidak mempengaruhi edisi KDE. Regresi pada KDE 4.14 mencegah aplikasi ini bekerja dengan baik di luar kotak di luar KDE.

Buka Manajer Paket Synaptic, dan cari kde-core-devel

Instal semua paket di bawah versi 4:4.14.2-0ubuntu1~ubuntu14.04~ppa1. Kemudian cari oxygen, dan instal tema ikon oksigen.