Binary package hint: network-manager
Basically, Ubuntu 7.10 won't reboot when clicking on the 'Reiniciar' button (my Ubuntu is in spanish). It freezes on the very last part of the orange progress bar, and does nothing unless I press the reboot button. I must say that at the beginning it worked, which surprised me. This is because I had Debian 4.0r1 previously installed, and had the same problem, but not sure if were the same reasons. On the other hand, the 'Apagar' (Shut down) button works correctly.
Then I tried rebooting from the console, but with the same effect. Except that in this occasion, I was able to see some console lines, which allowed me to see the cause. What they said:
NetworkManager: <WARN> nm_hal_deinit(): libhal shutdown failed - Connection is
closed
NetworkManager: nm_dbus_signal_device_status_change: assertion `cb_data->data->d
bus_connection' failed
NetworkManager: nm_dbus_signal_device_status_change: assertion `cb_data->data->d
bus_connection' failed
Then it shows the Ubuntu power off screen, with the progress bar about to be full. Then it stays there.
Thanks for your report, Did you upgraded from that Debian system? or this is a new installation with Gutsy? Does "reboot" works fine from the command line? can you attach your syslog (compresed) to the report?, thanks.