KDE – Set Dolphin as Default File Manager in Linux

You can add this entry manually: right click on the Places, choose Add Entry, enter this in Location field: recentdocuments:/// and save it. It should be available now in all KDE/Qt file dialogs.

Inspired by this post on the Ubuntu forums, I found out the culprit was the Hardware Abstraction Layer.

I ignored the device in question by creating the following file:

/usr/local/share/hal/fdi/preprobe/20thirdparty/10-ignore-swap.fdi

with the following contents:

<?xml version="1.0" encoding="UTF-8"?>
<deviceinfo version="0.2">
  <device>
    <match key="block.device" string="/dev/ada0p2">
      <merge key="info.ignore" type="bool">true</merge>
    </match>
  </device>
</deviceinfo>

This causes the device to be ignored by the HAL, and to no longer show up in the XFCE or KDE file managers.