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SubjectRe: Linux & X11 & IRQ Interrupts
On Sun, 05 May 2002 20:59:41 -0400
Justin Piszcz <war@starband.net> escribió:

> When I move the mouse under X11 I hear a buzzing sound in the computer,
> first, I found it was the console speaker.
I have the same problem. I've heard this in windows 9X with some programs wich just do what linux does, to cool the cpu.

I've tried a program wich just does:
main(){
do{
}while(1);
}

with the highest priority. (nice --19 ./cpu_sound). CPU time is 100% used,
but the noise _doesn't_ disappears.
I suspect it's just that I've a cheap power supply, and a Cyrix 6x86MX processor....


>
> Yet, I still hear a very faint sound when I move the mouse cursor, this
> is after I've disconnected the console speaker, no matter what the rate
> of interrupts.
>
> from itop:
>
> INT NAME RATE MAX
> 0 [ timer] 101 Ints/s (max: 101)
> 1 [ keyboard] 1 Ints/s (max: 1)
> 5 [ eth0] 2 Ints/s (max: 4)
> 12 [ PS/2 Mouse] 276 Ints/s (max: 276)
>
> Other people have also reported this problem but there hasn't been an
> apparent fix for it yet?
>
> With the console speaker attached, it can be clearly heard, as well as
> performing fast packet movements (nmap (with insane option)) or such you
> can literally hear the packets.
>
> When I am compiling an application or spending interrupts on disk
> access (copying files/doing a find), moving the mouse/holding a key on
> the keyboard does not make noise.
>
> Does anyone know the source of this problem, and possibly a solution, or
> something one can do to mute this annoying noise?
>
> This noise does not occur in any version of MS windows, so I am curious
> as to what the kernel? or x11? is doing to produce this noise?
>
>
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