lkml.org 
[lkml]   [2007]   [Jun]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: PC speaker
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.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-06-16 01:33    [W:0.052 / U:1.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site