I have some problems with lightdm/polkit/consolekit2 that's above my paygrade :). It results in authorization problems when mounting DVDs and CDs in desktop/filemanager. I'm using
Xfce 4.14 and lightdm loginmanager.
But a solution/workarund is to add a polkit rule in /etc/polkit-1/rules.d/50-udiskie.rules that fixes it like so:
polkit.addRule(function(action, subject) {
var YES = polkit.Result.YES;
// NOTE: there must be a comma at the end of each line except for the last:
var permission = {
// required for udisks1:
"org.freedesktop.udisks.filesystem-mount": YES,
"org.freedesktop.udisks.luks-unlock": YES,
"org.freedesktop.udisks.drive-eject": YES,
"org.freedesktop.udisks.drive-detach": YES,
// required for udisks2:
"org.freedesktop.udisks2.filesystem-mount": YES,
"org.freedesktop.udisks2.encrypted-unlock": YES,
"org.freedesktop.udisks2.eject-media": YES,
"org.freedesktop.udisks2.power-off-drive": YES,
// required for udisks2 if using udiskie from another seat (e.g. systemd):
"org.freedesktop.udisks2.filesystem-mount-other-seat": YES,
"org.freedesktop.udisks2.filesystem-unmount-others": YES,
"org.freedesktop.udisks2.encrypted-unlock-other-seat": YES,
"org.freedesktop.udisks2.eject-media-other-seat": YES,
"org.freedesktop.udisks2.power-off-drive-other-seat": YES
};
if (subject.isInGroup("storage")) {
return permission[action.id];
}
});
Now DVDs open automatically in Thunar (Xfce).
$XDG_SESSION_ID is empty and it should be set by lightdm or startxfce4 as far as I understand. I looked thru lightdm.conf and the script startxfce4, but couldn't figure it out.
(This is on a home system, so security is not always of concern)
Source link:
https://github.com/coldfix/udiskie/wiki/Permissions
Sidenote: If your having problems accessing /etc/polkit-1/rules.d/ you can set the execution bit like so:
sudo chmod +x /etc/polkit-1/rules.d/