Re: [jornada] Jornada 72x PM current status?

> --- Ursprüngliche Nachricht ---
> Von: Michael Gernoth <mlists_at_zerfleddert.de>
> An: jornada_at_handhelds.org
> Betreff: Re: [jornada] Jornada 72x PM current status?
> Datum: Wed, 18 May 2005 01:54:28 +0200
>
> On Tue, May 17, 2005 at 09:59:54PM +0100, Colin Sauze wrote:
> > if/when we get 2.6 kernels working we should be able to throttle the CPU
> > speed back which should help.
>
> After looking at the cpufreq code in kernel 2.6, I believe
> clock-throttling is currently unsupported on the Jornada 720.
> There are no sdram timing-values for the j720 in the 2.6 cpufreq-driver,
> which automatically disables it on this machine.
>
> I just hacked throttling to 59mhz when the fake "suspend" mode
> is entered into my 2.4.30 port and added timing values for
> the samsung sdrams at least some j720s use. This works fine on
> my machine, but I can't tell if it will work on a 728...
>
> The new kernel linux-2.4.30-vrs1-pxa1-j720-2 should be on my website
> in a few minutes and you should see something like the following in
> dmesg, when pressing the power-button:
>
> Suspend!
> Display OFF
> Old CPU frequency: 206400, new CPU frequency: 59000
>
> and "resume" again:
> Suspend!
> Old CPU frequency: 59000, new CPU frequency: 206400
> Display ON
>
> > I think some advantage might also be
> > gained by turning off PCMCIA/CF cards and halting processes.
>
> I'm working on it, but the kernel doesn't like when it's root device
> is suddenly switched off. Need to find a solution for that first.
>
> Regards,
> Michael

Probably a stupid question, but wouldn't it be possible to implement
suspend-to-disk?

Regards,
Jost Menke

-- 
Weitersagen: GMX DSL-Flatrates mit Tempo-Garantie!
Ab 4,99 Euro/Monat: http://www.gmx.net/de/go/dsl