打开终端，输入:
sudo gedit /usr/share/polkit-1/actions/org.freedesktop.devicekit.disks.policy
找到：
org.freedesktop.devicekit.disks.filesystem-mount-system-internal
在这个段里找到下面这一行:
<allow_active>auth_admin_keep</allow_active>
替换成：
<allow_active>yes</allow_active>.OK