alarm doesn't work. the volume adjusts to full but makes no noise

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What steps will reproduce the problem?
1.
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What is the expected output? What do you see instead?
When an alarm schedule is set, at the time it's supposed to go, the volume bar 
shows up on the screen but the phone doesn't make a noise. All volumes are set 
as high as they will go.

What version of the product are you using? On what operating system?
I have no idea, I don't have any updates available though. Android is all I 
know for sure for the OS.

Please provide any additional information below.

Original issue reported on code.google.com by Fritz...@gmail.com on 27 Apr 2011 at 9:02