If a mail attachment is saved, a message pops up, that contains the button "Open folder where attachment was saved". The action of this button always triggers dolphin, even if another file manager (here: krusader) is selected in the system settings as the default file manager. Thus, kmail should respect the choice of the default file manager configured in the system settings.
We use: KIO::highlightInFileManager(mUrls); Please report it against kio package thanks
Krusader does not implement the org.freedesktop.FileManager1 interface. Only Dolphin (and Nautilus) do and are autostarted by DBus when a call is placed.
Maybe a fallback would be good, that just starts the application if the current choice does not implement the DBUS interface. There may be a ton of other (maybe obscure) file managers or custom scripts (e.g., just drop to a shell) that do not implement the DBUS interface. Interestingly, the device manager respects my choice of file manager. Do they use KIO as well? Maybe, they have implemented a workaround?
*** This bug has been marked as a duplicate of bug 397953 ***