Re: RHEL4 power management

I want to put my laptop in standby/sleep mode when not
using it.


--- "Oliver Schulze L." <oliversamera.com.py> wrote:

> What do you want to do with ACPI ?
> 
> Amitava Majumdar wrote:
> > Hello,
> >
> > I was told that RHEL4 comes with ACPI-based power
> > management. Does anyone in the list know how to
> > activate it and use it. Would appreciate any
help.
> >   
> 
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On Sat, Apr 14, 2007 at 06:24:57PM -0700, Amitava Majumdar
wrote:
 > I want to put my laptop in standby/sleep mode when
not
 > using it.

iirc, RHEL4 has a /sys/power/state [*], but it never got any
testing
during development at all, as it wasn't a feature that we
invested
any time in. Additionally, RHEL4 doesn't have the necessary
code
from the pm-utils package to do wakeup of video on resume
from ram,
so it's unlikely to work.

RHEL5 has the pieces, but it's hit or miss whether it works
depending
on what laptop you have, whether or not it was tested during
RHEL5
development, and whether we've regressed since it was last
tested.

	Dave

[*] hibernate to disk support isn't present in RHEL4 at all,
but
'mem' _might_ be a valid state, but the caveats above
apply.

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