Puting system to 'sleep'

[Carsten]

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Baza wrote:

Hi,

| That just seems to deal with the display, I'm looking at putting the
'puter
| into a low power state, i.e. Hard drive, fan, off etc.

Unfortunately at the moment there are three different approaches to
enable linux using suspend modes. Only one of them, PMDisk, is enabled
in the Ubuntu default kernel. This is the most reliable one but it will
still be crashing many systems or make them suspend but never wake up
again, so use with care!
Then again, often it just won't do anything at all. And there's no
graphical UI I'd know about.
To enable PMDisk open a root shell and enter
echo -n "standby" > /sys/power/state
There are two alternative sleep modes you can replace "standby" with:
"mem" and "disk".
Before the first try you absolutely should change to non-graphical
single user mode, do a "sync" and have no files opened you still need.
The problem usually is not getting the machine asleep but waking it up
again. At desktop PCs it often works by pressing the power button,
laptops vary very much.
So the whole story is very far from what one would call "working", but
if you invest some work and patience you _might_ make suspend work on
your machine.
Success,
Carsten


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