[ltp] PCI Bus power saving

[Alex Deucher]

On 8/2/06, Shem Multinymous <multinymous@gmail.com> wrote:
> Hi,
>
> Under Windows, the ThinkPad power manager offers the following options
> (quoting PWRMGR.CHM)
>
> PCI Bus - Automatic/Disable: If you select Automatic, the PCI Bus
> clock is stopped if there is no activity. If you select Disable, the
> battery life will be shorter.

FWIW, years ago you had to disable the PCI power management in the
BIOS or the soundcard didn't work.  there was even a hack in the sound
driver (thinkpad=1) that would disable it after the fact.  I think
everything just works now.

Alex

>
> CPU - Automatic/Disable: If you select Automatic, then when there is
> no system activity for a specified interval, the power-saving function
> is enabled and the microprocessor clock is stopped automatically. If
> you select Disable, the battery life will be shorter.
>
> There are similar options in the BIOS.
>
> Does anyone know what they do exactly, and whether Linux can do that too?
>
>   Shem
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