Ubuntu – Ubuntu 13.04 shutdown hangs in Asus A3500E

13.04asusinstallationrebootshutdown

On reboot or shutdown, in a old Asus A3500E notebook, with a fresh Ubuntu 13.04 install, the process hangs and shows the messages:

"acpid: exiting"

"speech-dispatcher disabled; edit /etc/default/speech-dispatcher"

I don't know if the message is something that has just been finished correctly, or is the reason for the shutdown stop…

No proprietary drivers are suggested in Ubuntu SW Center. No more updates of Ubuntu are in list.

Forcing shutdown with power button, the screen gets black, but power light maintains on. The only way is to remove battery…

Any ideas?