Re: PC speaker

From: Phillip Susi
Date: Fri Jun 15 2007 - 19:30:40 EST

Jan Engelhardt wrote:
On Jun 15 2007 13:07, Phillip Susi wrote:
R.F. Burns wrote:
However, over the past several weeks, the students have found more
creative ways to abuse the PC speaker (outside of the OS.) The Powers
that Be are asking that the PC speakers be disabled completely. With
the small number of techs we have, it would be very impractical to go
around to all systems and remove the PC speaker from each and every
computer case.
Now I am curious; how are they getting the pc speaker to make any sound with
the kernel module disabled?

ioperm(), inb(), and outb() from userspace. Needs root, though. Or /dev/port, with write. Which comes to the question how they gained root. Perhaps live cd? In which case, the OP should, as recommended in this thread already, deactivate choosing boot devices, if that's possible.

(Unfortunately, newer BIOSes with 'integrated bootmenu' with F8 or so, but I have not seen a way to deactivate _that_ menu.)

He already said they don't have root access and that allowed him to stop them from accessing the sound card by setting appropriate permissions.

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