[ILUG] SUMMARY: SuSE 9.2 Pro

[Proinnsias Breathnach]

On Fri, Nov 19, 2004 at 11:05:01AM +0000, Robert Synnott wrote:
> On Fri, 19 Nov 2004 10:16:15 +0000, Brendan Kehoe <brendan at zen.org> wrote:
> >
> > With John Orford's suggestion that it might be the space used for suspending
> > to disk for hibernation, I paid more attention to what it was doing when I'd
> > put it to sleep (echo 3 > /proc/acpi/sleep, or closing the lid after my
> > 'powermanagement' file change).  It's apparently putting the image onto the
> > swap partition, perhaps selecting swap since the laptop only has 240Mb of
> > memory (16Mb are used by the Transmeta chip's morphing engine).
> > 
> Yep, the modern suspend does that. Any luck getting hardware
> sleep/suspend going, by the way?
> Rob.
> -- 
Um - Software Suspend (Swsusp-2) is what's called by ACPI sleep level 4
(echo -n 4 > /sys/power/state) ... and will write an image of your RAM
to swap. It'll awake properly once the kernel command includes
resume2=/dev/swapdevice ... (well - most of the time) - add a noresume
to the command line to skip resume and cold-boot. 

ACPI sleep level 3 is iffy at best - it's Suspend to RAM - and works in
some cases on the 2.6.N (N > 6) kernels. It's still under heavy
development - and things break and get fixed at breakneck pace. It's
not to be considered stable for most people though.

ACPI doesn't define a 'hardware sleep/suspend' going ... that's APM -
although S4bios is implemented on some dual-stacked (APM and ACPI)
hardware - no guarantee that'll work either - again it relies on a
suspend-to-disk partition being available - the bios takes care of
writing the image to disk and resuming it - but I have only heard of a
few cases where it's worked properly for new hardware.

P