Does FBSD support 'software suspend' ?

[Fabian Keil]

"Kevin Oberman" <oberman at es.net> wrote:

> >            Does FBSD support 'software suspend' like linux does ?
> > Also,from the archives i come to know that FBSD supports
> > 'suspend to disk'.What is the exact difference between the two ?
> > or are they one and the same ?
> 
> FreeBSD tries to support both. They are more technically referred to as S3 and 
> S4 states but are more typically called "suspend to RAM" and "suspend to disk" 
> respectively. The terms "suspend" and "hibernate" are also used.

AFAIK "software suspend" does not equal to "suspend to RAM".

There are two different "suspend to disk" modes. One is "software suspend"
the other "BIOS suspend". The second needs help by the BIOS and a special
formated slice, the first doesn't.

FreeBSD supports "BIOS supend" if the hardware supports it,
you can tell by checking hw.acpi.s4bios with sysctl.

GNU/Linux supports software suspend for S4 as well, ATM FreeBSD doesn't.

Fabian
-- 
http://www.fabiankeil.de/
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