linux-kernel - Re: PC speaker

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Message-ID: <84678.1244842821@turing-police.cc.vt.edu>
Date:	Fri, 12 Jun 2009 17:40:21 -0400
From:	Valdis.Kletnieks@...edu
To:	"R.F. Burns" <burnsrf@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: PC speaker

On Fri, 12 Jun 2009 17:28:40 EDT, "R.F. Burns" said:
> Is it possible to write a kernel module which, when loaded, will blow
> the PC speaker?

Highly unlikely, as the circuitry *driving* the speaker is probably hard-wired
to not output more than the speaker coils can handle.

You *might* be able to find a way to generate a nasty square wave that will
over time stress the speaker cone - but a "*pow* it's dead"? Probably not.

If your speaker just fried, it's more likely a short or other hardware or
mechanical defect.

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