我重新安装了 Kubuntu 14.04 中的 Amarok 播放器，因为它似乎有问题。我在终端中注意到了这一点：
david@EMACHINE:~$ sudo apt-get install --reinstall amarok
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 5,715 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://mirror.lstn.net/ubuntu/ trusty/universe amarok i386 2:2.8.0-0ubuntu3 [5,715 kB]
Fetched 5,715 kB in 2s (2,611 kB/s)
(Reading database ... 128504 files and directories currently installed.)
Preparing to unpack .../amarok_2%3a2.8.0-0ubuntu3_i386.deb ...
Unpacking amarok (2:2.8.0-0ubuntu3) over (2:2.8.0-0ubuntu3) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for mime-support (3.54ubuntu1) ...
Processing triggers for shared-mime-info (1.2-0ubuntu3) ...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Unknown media type in type 'uri/mms'
Unknown media type in type 'uri/mmst'
Unknown media type in type 'uri/mmsu'
Unknown media type in type 'uri/pnm'
Unknown media type in type 'uri/rtspt'
Unknown media type in type 'uri/rtspu'
Processing triggers for man-db (2.6.7.1-1) ...
Setting up amarok (2:2.8.0-0ubuntu3) ...
Processing triggers for libc-bin (2.19-0ubuntu6) ...
看看所有未知因素。这些可能是导致播放器无法正常工作的原因吗？如果是错误，我该如何修复？
答案1
这是一个错误，请参阅https://bugs.launchpad.net/ubuntu/+source/shared-mime-info/+bug/289592
尝试
sudo rm /usr/share/mime/packages/kde.xml
sudo update-mime-database /usr/share/mime
答案2
不确定该错误意味着什么，但我会与您分享对我有用的方法。
基本上只是删除文件中所有错误的 mime 类型kde.xml。
运行之后：
sudo update-mime-database /usr/share/mime
前两个看起来应该像这样；
<mime-type type="all/all">
<comment>all files and folders</comment>
</mime-type>
<mime-type type="all/allfiles">
<comment>all files</comment>
</mime-type>
对其余操作进行同样操作，然后根据需要注销/登录。