Re: ac adapter serious problem
On Dec 14, 2007 4:34 PM, Benjamin Schmidt <schmidi2@directbox.com> wrote:
>
> roberto wrote:
> > hello
> > unfortunately, i encountered a bad problem in my laptop (Dell Latitude
> > D600) very frequent on these models:
> > sometimes, the BIOS does not recognize the ac adapter and this
> > seriously prevents the system performance: the CPU works at 600MHz
> > (instead of 2000MHz); if the battery is not at 100% then the ac
> > adapter cannot recharge it and so on...
> >
> > now, since the current can flow inside the pc i'd like to tell Debian
> > to force the CPU working at full speed, without concerns about the
> > adapter
> >
> > i post here this output since it may be helpful:
> >
> > ~$ cat /proc/acpi/processor/CPU0/power
> > active state: C2
> > default state: C1
> > bus master activity: ffffffff
> > states:
> > C1: promotion[C2] demotion[--] latency[000] usage[00198990]
> > *C2: promotion[C3] demotion[C1] latency[050] usage[01315600]
> > C3: promotion[--] demotion[C2] latency[050] usage[00000000]
> >
> >
> > thank you very much
> > --
> > roberto
> > OS: GNU/Linux, Debian
> >
> >
>
> Hey Roberto
>
> Best would be doing a bios upgrade, if a newer version is available.
>
> > ~$ cat /proc/acpi/processor/CPU0/power
> > active state: C2
>
> > ...
>
> to change this state (this is probably your question), do this:
>
> $ su
> # echo 1 > /proc/acpi/processor/CPU0/power
>
> The echo-command with the ">" does not work with sudo (or I do not know
> better), so you actually have to be root.
>
> Please note that "/proc/acpi/processor/CPU1/throttling" would also be
> interesting for you.
>
> But still a bios upgrade would be the better solution.
i hardly know how to do it ...
--
roberto
OS: GNU/Linux, Debian
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