It appears that ubiquity is being invoked via sudo for all flavours, including Ubuntu. Here is the Exec= line from ubiquity.desktop:
```
#use sh because pkexec is broken under xfce/lxce http://pad.lv/1193526
Exec=sudo --preserve-env=DBUS_SESSION_BUS_ADDRESS,XDG_RUNTIME_DIR sh -c 'ubiquity gtk_ui'
```
It appears that ubiquity is being invoked via sudo for all flavours, including Ubuntu. Here is the Exec= line from ubiquity.desktop:
``` pad.lv/ 1193526 env=DBUS_ SESSION_ BUS_ADDRESS, XDG_RUNTIME_ DIR sh -c 'ubiquity gtk_ui'
#use sh because pkexec is broken under xfce/lxce http://
Exec=sudo --preserve-
```