I have an Acer Extensa 4420-5963. It's brand new (I only got it two weeks ago), and I recently installed Ubuntu 8.10 on it (I upgraded from Ubuntu 8.04). However, now, whenever I close the screen or turn the volume up too high, the computer makes this loud, ominous screeching sound.
If anyone else has had this happen to them, please tell me how you fixed it because this is really annoying me.
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