After upgrading system to XFCE 4.12 then i try to mount/unmount disk or usb flash in Thunar it prompts me a password (via udisks2). Same as if i launch disk from desktop. Don't know how to debug. My system: System: Linux Mint 17 Qiana xfce4.12 Kernel: i686 Linux 3.13.0-24-generic CPU: Intel Atom CPU N450 @ 1.667GHz Video driver: Kernel driver i915 Graphic processor: VGA compatible Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller X.Org X Server 1.15.1 Thunar 1.6.6 Last installed packages during upgrade: http://pastie.org/10045488
I found a problem source. It's all because systemd didn't start MDM automatically, and system booting hangs, and i had to start MDM manually from virtual tty console, and that is why the session was, somehow not enough authorized to do power and disks management. As workaround i switched to use LightDM instead MDM, and it starts fine.
Configuration problem, closing invalid.