Comment 61 for bug 331589

found this bug while searching for fixes to the system beep in kubuntu after a jaunty upgrade.

suggestions:
firefox in about:config has a typeahead find setting with a value of beep - remove that and typeaheadfind no longer causes brown trousers.
KDE: open kmix, Settings menu ... Configure Channels and make sure PC Beep is checked, then ensure it is muted in the mixer. Fixes this for Kubuntu/KDE (and makes the firefox fix above redundant)

card info:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)
        Subsystem: Dell Device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 21
        Region 0: Memory at febfc000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

I didn't have a pcspkr module either to blacklist.