I just recently installed Ubuntu 8.04 on my notebook after being Linux-less for a year. My Vista partition works fine upon resume, and in the past when I had an earlier version of Ubuntu I didn't get beeps. It doesn't happen every time, but enough where it's annoying.

It happens just as I open the lid, before the password dialog is displayed. System beeps are disabled, so it seems to happen as everything is waking back up. It also happens (as near as I can tell) on both battery and AC power.

I'm running a Dell Inspiron 6400/E1505. It's not a Dellbuntu, but it is a very Linux compatible machine... Intel 915 graphics, Intel 3945 wireless, etc.

Searching the forums and Googling haven't turned up anything interesting, and I'm not sure how to continue troubleshooting from here. Any suggestions?