xdg-open 只是打开 Nautilus

Question

我正在使用 Gnome 3.12 运行 Fedora 20。最近，我通过安装 KDEyum但决定坚持使用 Gnome。自从安装 KDE 后，xdg-open和gnome-open命令不会打开带有关联应用程序的文件，而是打开 Nautilus，选择文件。在 Nautilus 中双击该文件将打开关联的应用程序。

例如：

[user@host ~]$ xdg-mime query filetype test.pdf
application/pdf
[user@host ~]$ xdg-mime query default application/pdf
evince.desktop
[user@host ~]$ xdg-open test.pdf
[user@host ~]$ gnome-open test.pdf

但是最后两个命令都打开了 Nautilus。另一方面，kde-open 确实有效，打开 evince（kioclient并向标准输出写入一些东西，不知道这是否有任何相关性）：

[user@host ~]$ kde-open test.pdf
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.sheet.binary.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.addin.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.slideshow.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.sheet.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.presentation.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-word.template.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.template.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.template.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-word.document.macroEnabled.12" 
kioclient(27111) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.slide.macroEnabled.12"

我知道这个线程，但使用该mimeopen命令并没有解决我的问题。

到目前为止，我没有卸载 KDE，因为我不确定具体是如何卸载的，也不想破坏东西。然而，任何涉及摆脱 KDE 的解决方案都是可以接受的，给出一些关于如何操作的指示。