Problem in Ubuntu: when count of logged in users more than one and USB flash drive is connectig to the PC and after switching the user the window of authentication appears. This annoying popup can be simply fixed.
Authentication is required to mount USB /dev/sdc1
Checking the file:
$ sudo nano /var/lib/polkit-1/localauthority/10-vendor.d/com.ubuntu.desktop.pkla
which actions we have for this rule:
[Mounting, checking, etc. of internal drives] Identity=unix-group:admin;unix-group:sudo Action=org.freedesktop.udisks.filesystem-*;org.freedesktop.udisks.drive-ata-smart*;org.freedesktop.udisks2.filesystem-mount-system;org.freedesktop.udisks2.encrypted-unlock-system;org.freedesktop.udisks2.filesystem-fstab; ResultActive=yes
We're interesting in mounting rule org.freedesktop.udisks2.filesystem-mount-system
To fix our bug you should made changes to the file /usr/share/polkit-1/actions/org.freedesktop.UDisks2.policy
$ sudo nano /usr/share/polkit-1/actions/org.freedesktop.UDisks2.policy
in action <action id="org.freedesktop.udisks2.filesystem-mount-system">
change
<defaults> <allow_any>auth_admin</allow_any> <allow_inactive>auth_admin</allow_inactive> <allow_active>auth_admin_keep</allow_active> </defaults>
to
<defaults> <allow_any>no</allow_any> <allow_inactive>no</allow_inactive> <allow_active>auth_admin_keep</allow_active> </defaults>
Finally USB flash drive will be mounted ONLY for current active user and there will be no popup window when activating another user session. No more password enering to mount usb drive. Use USB drive only in active user session.
In this case the popup still had a place when you want to unmount USB flash drive from another user.
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