Within one or two days, I suppose not more a new Edu to test will be ready. I found a terrible flaw in the setup of the system : do you remember I changed the configuration of the fixed devices in /etc/PolicyKit/PolicyKit.conf file ? (grumbleble !!! high cases !
This forces users who want to access to partitions such as windows partitions or other distros if there are any to provide the root password. I realized today that just changing the configuration in the preferences of pcmanfm was just making that config suddenly ineffective ! after logout/login, or reboot : all the partitions were mounted and available for any purpose...
I have passed time on docs, chans, docs, google, did different little tests in the files, and suddenly... in the Archlinux wiki : miracle, I found a solution !
As we still use hal (and will be for some time seeing the number of apps that depend on it in our systems... unless we switch fast from now to next year... ), well now we do use hal, so this config is valid.https://wiki.archlinux.org/index.php/HAL
Device specific policies
Disable Automount on login
You may want to disable automounting of ntfs(/or other filesystem) partitions on login.
<match key="storage.hotpluggable" bool="false">
<match key="storage.removable" bool="false">
<merge key="storage.automount_enabled_hint" type="bool">false</merge>
as soon as I noticed this part I tried it. The result seems good ! I ticked all the mount volumes section in the PCManFM preferences and after logout, login, reboot : the volumes are not default mounted anymore, and when clicking one one of the icons representing a partition, in the left sidebar of the file manager, I am prompted for the root password.
It seems that one of the goals around the security of the datas in hard drives is reached ! '