Dell Precision m4400 acline problems

[Stefan Farfeleder]

On Fri, Jun 25, 2010 at 01:05:38AM +1000, Ian Smith wrote:
> On Thu, 24 Jun 2010, Stefan Farfeleder wrote:
>  > 
>  > Thanks. I think I solved my problem. I do not use power profiles and
>  > thus the dev.cpu.0.freq stays at 2801. However going offline evidently
>  > causes the frequency to decrease internally, ie. without dev.cpu.0.freq
>  > knowing, so when I manually reset the frequency to 2801, the system is
>  > fast again.
> 
> Goodo.  But adding these to /etc/rc.conf would save that manual bother:
>  performance_cpu_freq="HIGH"
>  economy_cpu_freq="HIGH"
> since /etc/rc.d/power_profile is run on ACAD events anyway, at least 
> with the default /etc/devd.conf

No, unfortunately that's not sufficient.  I really have to decrease and
increase the frequency.  I think the reason is that the ACPI kernel code
simply ignores setting the frequency to the same value.

Stefan