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Each time apt-get tries to process triggers for shared-mime-info, it reports warnings like:

...
Processing triggers for shared-mime-info...
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'
Unknown media type in type 'interface/x-winamp-skin'

I've checked /usr/share/mime-info but doesn't see any of them:

/usr/share/mime-info$ grep 'url/rtspu' *
(Got nothing)

So, how to clean up my system so it won't report these unknown media types?

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up vote 9 down vote accepted

This was discussed in Why does update-mime-database complain about uri/rtspt and other unusual types? It is caused by kde.xml and they have not fixed it yet. Here is a bug report.

Also it's uri/rtspu, not url/rtspu you should be grepping.

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sudo mv /usr/share/mime/packages/kde.xml /usr/share/mime/packages/kde.xml.bkp
sudo update-mime-database /usr/share/mime

This should fix the warnings.

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19  
What are the (other) consequences of removing this file? – Sparhawk Mar 17 '14 at 11:06
2  
What harm could this do? – Tim Dec 23 '14 at 18:34
4  
If concerned about the consequences, instead of removing kde.xml, move it to kde.xml.bak and you'll have a backup. Thus far I've had no adverse effects with this approach. another method would be to edit the file and remove the fake mime types as discussed at mapopa.blogspot.com/2011/01/… – Elder Geek Mar 26 '15 at 14:22
    
Thanks, edited answer :) – mirkobrankovic Mar 26 '15 at 21:54

You should check /usr/share/mime/packages for the specific xml that contains the phrase you get .

For example, my problem was Unknown media type in type 'chemical/...... I found the file /usr/share/mime/packages/chemical-mime-data.xml.

Using cat on the file showed me that the package was the same chemical-mime-data V 0.94

So I ran:

sudo apt-get remove chemical-mime-data
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