Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

[Lorenzo Hernandez Garcia-Hierro]

Hi,

When the 2.6.0 inits in my laptop it becomes reaaallyyy noisy.
Why ?
A very strange ( sometimes funny when there is no headake ) thing is
that the lan mini-pci card starts doing noises when it receives packets
xD

Best regards and thanks in advance .
Lorenzo.

Re: Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

[Neil Brown]

On  January 7, lorenzohgh@nsrg-security.com wrote:
> 
> Hi,
> 
> When the 2.6.0 inits in my laptop it becomes reaaallyyy noisy.
> Why ?

What sort of noise?  High pitched whine?  
I fix it with the following patch.

NeilBrown



Status: ok

Reduce HZ to 100

see if it affects noise..

 ----------- Diffstat output ------------
 ./include/asm-i386/param.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff ./include/asm-i386/param.h~current~ ./include/asm-i386/param.h
--- ./include/asm-i386/param.h~current~	2003-12-26 14:44:21.000000000 +1100
+++ ./include/asm-i386/param.h	2003-12-26 14:50:36.000000000 +1100
@@ -2,7 +2,7 @@
 #define _ASMi386_PARAM_H
 
 #ifdef __KERNEL__
-# define HZ		1000		/* Internal kernel timer frequency */
+# define HZ		100		/* Internal kernel timer frequency */
 # define USER_HZ	100		/* .. some user interfaces are in "ticks" */
 # define CLOCKS_PER_SEC	(USER_HZ)	/* like times() */
 #endif

Re: Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

[Tommi Virtanen]

Lorenzo Hernandez Garcia-Hierro wrote:
> When the 2.6.0 inits in my laptop it becomes reaaallyyy noisy.
> Why ?

If it's the fans, it's the BIOS reading CPU temperature of 85 C,
which is not true. It seems a Fn-Z press resets this reading to
sane values. You can look at the temperature reading and fan
state with i8kutils.

Atleast that's what a Dell Latitude C640 that I had did.

Re: Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

[Bart Samwel]

On Tuesday 13 January 2004 14:58, Tommi Virtanen wrote:
> Lorenzo Hernandez Garcia-Hierro wrote:
> > When the 2.6.0 inits in my laptop it becomes reaaallyyy noisy.
> > Why ?
>
> If it's the fans, it's the BIOS reading CPU temperature of 85 C,
> which is not true. It seems a Fn-Z press resets this reading to
> sane values. You can look at the temperature reading and fan
> state with i8kutils.
>
> Atleast that's what a Dell Latitude C640 that I had did.

Might it be that the hardware reports 85 F instead of 85 C maybe? That's about 
(85-32)*0.55 = about 29 C, which may be more realistic when you're just 
booting it up. :)

-- Bart

Re: Noise with 2.6.0 in a Dell Laptop ( Latitude c600 )

[Tommi Virtanen]

Bart Samwel wrote:
>>>When the 2.6.0 inits in my laptop it becomes reaaallyyy noisy.
>>>Why ?
>>If it's the fans, it's the BIOS reading CPU temperature of 85 C,
>>which is not true. It seems a Fn-Z press resets this reading to
>>sane values. You can look at the temperature reading and fan
>>state with i8kutils.
>>
>>Atleast that's what a Dell Latitude C640 that I had did.
> Might it be that the hardware reports 85 F instead of 85 C maybe? That's about 
> (85-32)*0.55 = about 29 C, which may be more realistic when you're just 
> booting it up. :)

Only if it switches between C and F at runtime. Normal readings when 
loaded were 55-65, IIRC.