[ltp] the purpose or advantage of suspend and hibernation

Alexander Gran linux-thinkpad@linux-thinkpad.org
Wed, 19 Nov 2003 15:15:44 +0100

Hash: SHA1

> There is even many variations of suspend: suspend to
> ram, suspend to disk, etc. What is it about?

Well suspend to ram lets only the rams alive. This takes nearly no power, a=
suspending/resuming is fast, only few seconds depending on your kernel. It =
ok for offtimes of several hours, but not days.
Suspend to disk/hibernation writes all data from the ram to the harddisk.=20
Everything is powered off afterwards, this makes STD a solution for longer=
periods. However, for people with a lot MBs, suspendung and resuming takes=
really long. However it can still be faster than a reboot, as you don't nee=
to restart everything and open your files.

> Why not just shutdown and boot again when needed? It
> doesn't take _that_ long, unless of course you run a
> fashionable GUI Desktop (I don't).

My T40 boots in ca. 1 min (with KDE). Suspending takes ca 5 seconds.=20

> What are the advantages? Under what circumstances will
> they prove useful or perhaps even necessary? Do they
> save power or something like that? Nay! How can they
> compared to shutting down of powering off!?

Well, I don't have to restart all aplications, so if you are e.g. short on=
battery power, you can suspend while fetching a coffee. A reboot takes way=

> Disadvantages? Right now I cannot see the
> advantages... A couple of common sense comments could
> help out here, please.

disadvantages? Well it doesn't work always..


=2D --=20
Some operating systems are called `user friendly',
	Linux however is `expert friendly'.
Encrypted Mails welcome.
PGP-Key at http://zodiac.dnsalias.org/misc/pgpkey.asc | Key-ID: 0x6D7DD291
Version: GnuPG v1.2.3 (GNU/Linux)