ACPI state 4

ACPI state 4

[Henry Umansky]

Hello,
I just compiled Linux kernel 2.6.1 with ACPI support and I wanted to test 
out the different sleep states.  So I ran the command:

$echo 4 > /proc/acpi/sleep

And it started freeing up memory and everything looked like it worked. 
Then my computer shut off.  When I pressed the power button, it started up 
and I started my linux kernel with the following GRUB commands:

root (hd0,0)
kernel /vmlinuz resume=/dev/hda2

And it looks like ACPI attempts to read the state from the swap partition 
(/dev/hda2) but then it reboots all of a sudden.  This happens everytime I 
try to recover.  When I try to boot normally, most of my files are corrupt. 
I'm guessing that when I entered the S4 sleep state, everything in the swap 
partition didn't sync with my hard drive, because a lot of my text files 
are corrupt and can't be read anymore.  I apologize if I didn't include 
enough information, because I'm new to this mailing list and this is the 
first "real" time I've messed with ACPI.  Let me know if you need anymore 
information.

Thank you,
Henry

PS-this might help, but when I did a cat /proc/acpi/sleep is showed S0, S1, 
S2, S3, S4bios, and S5.  Maybe also S6 but I can't remember and since I 
don't have a stable running system, I can't really check.


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Re: ACPI state 4

[Stefan Seyfried]

On Mon, Feb 02, 2004 at 02:43:21PM -0500, Henry Umansky wrote:

> And it looks like ACPI attempts to read the state from the swap partition 
> (/dev/hda2) but then it reboots all of a sudden.  This happens everytime I 

try suspending a minimal system (no sound driver, no USB driver, no X). If this
works, add one service a time and try out, which one behaves badly.
I have to stop hotplug and remove USB modules to suspend my machines, probably
you need something similar.

> try to recover.  When I try to boot normally, most of my files are corrupt. 
> I'm guessing that when I entered the S4 sleep state, everything in the swap 
> partition didn't sync with my hard drive, because a lot of my text files 
> are corrupt and can't be read anymore.  I apologize if I didn't include 

Don't know about your text files, but i always do a
sync; blockdev --flushbufs /dev/hda
prior to suspending.
-- 
Stefan Seyfried



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Re: ACPI state 4

[Pavel Machek]

Hi!

> I just compiled Linux kernel 2.6.1 with ACPI support and I wanted to test 
> out the different sleep states.  So I ran the command:
> 
> $echo 4 > /proc/acpi/sleep

I suggest doing 

sync; echo 4 > sleep

...just to be safe.

> And it started freeing up memory and everything looked like it worked. 
> Then my computer shut off.  When I pressed the power button, it started up 
> and I started my linux kernel with the following GRUB commands:
> 
> root (hd0,0)
> kernel /vmlinuz resume=/dev/hda2
> 
> And it looks like ACPI attempts to read the state from the swap partition 
> (/dev/hda2) but then it reboots all of a sudden.  This happens everytime I 
> try to recover.  When I try to boot normally, most of my files are corrupt. 
> I'm guessing that when I entered the S4 sleep state, everything in the swap 
> partition didn't sync with my hard drive, because a lot of my text files 
> are corrupt and can't be read anymore.  I apologize if I didn't include 
> enough information, because I'm new to this mailing list and this is the 
> first "real" time I've messed with ACPI.  Let me know if you need anymore 
> information.

AGP likes to do this. Try without that one.
								Pavel 

-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]


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Re: ACPI state 4

[Bruno Ducrot]

On Tue, Feb 03, 2004 at 01:32:29PM +0100, Pavel Machek wrote:
> Hi!
> 
> > I just compiled Linux kernel 2.6.1 with ACPI support and I wanted to test 
> > out the different sleep states.  So I ran the command:
> > 
> > $echo 4 > /proc/acpi/sleep
> 
> I suggest doing 
> 
> sync; echo 4 > sleep
> 
> ...just to be safe.

It's fine also to test in single mode.

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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