[PLUG] NEW TOPIC: Hibernate in Linux (Specifically Redhat 7.3)

[Greg Long]

No, actually I'm talking about a full suspend-to-disk "Hibernate":

As much as I can join the ranks and diss Windows XP (and there are MANY,
many, reasons to do so, I'm sure we can all agree there)....one very
nice feature is a full hibernate to disk followed by a power off - the
batteries are not drained at all.  When the OS is powered back up, it
resumes where it left off.  This works very well - I only find I have
issues with media playback.  Lengthy DivX threads, etc. will keep going.


This is also nice when I want to leave everything as-is and then reboot
to RedHat 7.3 (dual boot).  Because GRUB is pulled up first, I can
select RH7.3, play around, then shutdown and reboot come back to GRUB,
where I then Select Windows XP and whammo - Windows resumes.

The laptop is a IBM A30 - P3 1ghz, though my fiance's p2-300 does it
well too.

Clearly, anyone who has ever lived as a dual-booting road warrior can
see the advantage of this ;)  I can shut my box down, pack it, travel to
my next appointment (class, in my case) and whammo - I'm back where I
left off.

It's also plain to see that if someone doesn't need to close all apps in
order to do this in Linux and boot to Win, it would be a lot easier to
use it more as a client.  As a result, I never really get around to
using Linux as a client as much as I'd like to.

I didn't mean to turn this into a pitch for developers to start a
project implement this, but I think the advantages for those who who see
Linux as a "movement" or a "cause" are obvious - breaking down barriers
to usage.  At home, I mostly use VNCserver to access my server box.
This works well, though it's a server, and not generally used as a
workstation - plus I don't like the idea of working as root too much for
obvious reasons (one of the inherrent limitations of vncserver).

Greg Long
http://www.maneuveringspeed.com/


-----Original Message-----
From: plug-admin at lists.pdxlinux.org
[mailto:plug-admin at lists.pdxlinux.org] On Behalf Of Shannon C. Dealy
Sent: Friday, May 31, 2002 10:57 PM
To: PLUG
Subject: Re: [PLUG] NEW TOPIC: Hibernate in Linux (Specifically Redhat
7.3)


On Fri, 31 May 2002, Greg Long wrote:

> Anyone successfully get this to work? A number of us like to dual boot

> our laptops, and it would be that much easier to spend more time in 
> Linux (I use Linux mostly as a server, not as a client as much as I'd 
> like to now that available software is getting better and better)
>
> But to the point:  Does this need to be a kernel mod that needs to be 
> recompiled, and how does Gnome/KDE do upon resume?

I assume by "hibernate" that you mean "suspend" where the computer keeps
everything in ram but shuts down the screen, hard drive, CPU, etc., so
you can quickly power-up and pickup where you left off.  I have done
this successfully on my old laptop, but haven't used the feature with
the latest upgrades or gnome (I don't use this laptop much these days).
As far as what you need, it requires APM (advanced power management) be
compiled into the kernel or a kernel module.  There are also some
options to look at which are specific to some poorly behaved laptops
when you select the APM option.  Aside from the kernel option(s), you
need the program "apmd" which provides the interface to the power
management system and does things like reset the Linux time when the
system powers back up and other power management related stuff.  This
setup worked fine for me using fvwm and ice window managers (never tried
Gnome or KDE).

I'm working from memory of an older configuration, so there may be some
differences with the latest stuff, perhaps someone else on the list has
done this more recently.

Shannon C. Dealy      |               DeaTech Research Inc.
dealy at deatech.com     |          - Custom Software Development -
                      |    Embedded Systems, Real-time, Device Drivers
Phone: (800) 467-5820 | Networking, Scientific & Engineering
Applications
   or: (541) 451-5177 |                  www.deatech.com


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