E521 Keyboard key problem

[Stuart_Hayes at Dell.com]

I'm not an expert, but I think you can prevent CPU frequence changes by
changing the cpufreq governor in
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ("echo performance
>scaling_governor" if performance is once of the options in
scaling_available_governors).  You'd have to do this for all the
processors, though, not just cpu0.

Stuart

-----Original Message-----
From: linux-desktops-bounces at dell.com
[mailto:linux-desktops-bounces at dell.com] On Behalf Of Simon Gao
Sent: Monday, March 26, 2007 11:38 AM
To: Brown, Michael E
Cc: linux-precision-Lists; linux-desktops
Subject: Re: E521 Keyboard key problem

Michael E Brown wrote:
> On Thu, Mar 22, 2007 at 03:10:24PM -0700, Simon Gao wrote:
>   
>> Hi,
>>
>> We have one E521 AMD X2 machine that has been having keyboard key 
>> randomly repeating problem, sometimes a random key would repeat very 
>> fast and many many times like 
>>
thisssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
ssssssssssssssssssssssssssssssssssssssssssssssssssssssss.
>> When this happens, I have to reboot the machine to temporarily fix 
>> the problem. The problem will come back in a few days.
>>
>> The machine runs RHEL 4.4 x86_64 on it. I've also updated bios to
1.1.4. 
>> This seems not help at all.
>>
>> Anyone can provide any help?
>>     
>
> Can you disable PowerNow in the BIOS and see if that helps?
>
> There was a recently discovered USB keyboard disconnect problem that 
> only affects machines with PowerNow enabled.
> --
>   
I did not find a way to disable PowerNow feature from E521's Bios. I
wonder if there is a way to disable it from kernel to achieve the same
result.

Simon

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