Hya,

System
Debian jessie (amd64) with xfce4

Situation
Something went wrong with Thunar volman, -no automount, choke after manual mount (/usr/lib/udisks2/udisksd hanged)

What I did
aptitude purge udisks2
aptitude install udisks2

What I got
Completely dead volume management.
Removable medias are recognised by kernel, but not desktop, xfce, thunar...

Troubleshooting
reinstall gvfs -> not work.
reinstall dbus, dbus-daemon -> not work.
reboot -> not work.

reinstall thunar-volman -> not work.
reboot -> good, but still pop-up message does not show up.

Assessment
I am still under troubleshooting.
If anybody hit same situation, it may be a good idea to follow what I did.

If anybody has better solution, it would be nice to post here.

Closing remark
Happy Penguins!

Hya,

correction

In my previous post, under Troubleshooting

wrong : reinstall dbus, dbus-daemon
correct: reinstall dbus, gvfs-daemons

update
I found that automount did not work, (thunar-volman is configured correct!!)

I narrowed down that "Thunar daemon did not kicked in, when xfce4 was started."

Self reply.

Adding "thunar --daemon" at startup script is good enough.

cheers