[ubuntu] How to recover the shutdown beep in 9.10?

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http://ubuntuforums.org – Hi,friends I vividly remember the beep in 9.04 when I shutdown the computer sudo shutdown -h now and I will hear a "DI"/"Bee" sound sudo shutdown -h +5 and I will hear 5 beeps every minute till it is power off The beep is a great warning for me and I really need this feature however,I tried many approach to recover it in 9.10 but failed now 10.04 is coming soon,I guess it also won't have this feature. Can someone help me ? thx a lot (Hardware)