S1bios

S1bios

[Luís Miguel Pires Neves]

Hi!

This is just a request (desire).

As S1 is not completely working (backlight, disks spinning...), I wonder if 
one couldn't find a temporary solution similar to S4bios for machines that 
have S1 in bios.

I apologise if what I'm saying is stupid as I'm not a developper, just a 
ordinary Linux user who has been following the development of ACPI and swsusp 
in order to have it's Laptop with the usual functionality of laptops..

In my first times with Linux in this machine (COMPAQ Presario 12XL515) I 
used APM with kernel 2.2.17 (Debian Potato's version) and I had "S1" 
behaviour with apm -S. At the time it was the single working function as the 
battery status/information wasn't there, and "S4" seemed also to be absent ( 
I know now that it was there but it needed a proper configured partition). 
However with more recent kernels, both 2.2 and 2.4  (not patched with Debian 
patches) I never had the APM sleeping function working again.

Anyway I started using ACPI for battery information, and Swsusp for 
hibernation purposes, but I still miss the ability of putting the system in a 
soft sleep so that I can move it from one place to another, or have a cup of 
coffee without having to wait still some time for a swsusp suspend/resume 
cycle.

As S4Bios was created to use the ability of the machines who still have some 
APM support to overcome the current limitations and difficulties of swsusp, 
isn't it possible to do the same with S1?

Best regards,

Luís Neves



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Re: S1bios

[Patrick Mochel]

> As S4Bios was created to use the ability of the machines who still have some 
> APM support to overcome the current limitations and difficulties of swsusp, 
> isn't it possible to do the same with S1?

No. S1 is a very simple suspend state, and IIRC, doesn't require that 
devices even be powered down. 

There are two solutions to your problem - a quick easy one that anyone can 
do, and a right one that we desparately need people to start doing. 

The first: userspace. You may be able to turn off the backlight via some 
command. I've seen it done before, but it's been a long time. You may also 
be able to spin down the disks. 

The right way to do it is to fix the drivers to properly handle suspend/
resume transitions. It's needed for all power states, as well as 
supporting runtime power management. 


	-pat



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Re: S1bios

[Pavel Machek]

Hi!

> > As S4Bios was created to use the ability of the machines who still have some 
> > APM support to overcome the current limitations and difficulties of swsusp, 
> > isn't it possible to do the same with S1?
> 
> No. S1 is a very simple suspend state, and IIRC, doesn't require that 
> devices even be powered down. 
> 
> There are two solutions to your problem - a quick easy one that anyone can 
> do, and a right one that we desparately need people to start doing. 
> 
> The first: userspace. You may be able to turn off the backlight via some 
> command. I've seen it done before, but it's been a long time. You may also 
> be able to spin down the disks. 

Actually, I have not found out a way to turn off backlight on toshiba
4030cdt without using APM. Nor I know how to turn off backlight on hp
omnibook.

> The right way to do it is to fix the drivers to properly handle suspend/
> resume transitions. It's needed for all power states, as well as 
> supporting runtime power management. 

Well, and should S1 turn backlight off? It seems like the original
poster wants S3, not S1.
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]


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Re: S1bios

[Luis Neves]

Em Quarta, 12 de Março de 2003 21:52, escreveste:
> Hi!
..............
> > The right way to do it is to fix the drivers to properly handle suspend/
> > resume transitions. It's needed for all power states, as well as
> > supporting runtime power management.
>
> Well, and should S1 turn backlight off? It seems like the original
> poster wants S3, not S1.
> 								Pavel
Not exactly. As far as I understood, S3 is a deep sleep state, S1 is a soft 
sleep, and in fact my machine doesn't support S3. Only S1 and S4.

I use hdparm -Y /dev/hda to stop the disk when moving but sometimes it starts 
spinning again before arriving to the new spot. Anyway, currently S1 is 
broken for me (2.4.20+ acpi20021212) :  it doesn't wake.

Best regards and keep up the good work,

Luís Neves




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Re: S1bios

[Ducrot Bruno]

On Mon, Mar 10, 2003 at 10:51:53PM +0000, Luís Miguel Pires Neves wrote:
> Hi!
> 
> This is just a request (desire).
> 
> As S1 is not completely working (backlight, disks spinning...), I wonder if 
> one couldn't find a temporary solution similar to S4bios for machines that 
> have S1 in bios.

S4Bios was easy.  It is documented in specs.  An equivalent to S1 (or S3 btw)
would require hackeries (something like call bios to switch to legacy mode,
then call apm suspend, then recall bios to switch to acpi mode).

I don't have a platform that have correct apm support, and I can only provide 
untested patch in that area.  Worst, I think that S1 is not the real problem
actually, but more a driver problem (especially with 2.4 series).
And controlling the backlight for example is somehow hard to achieve
in a generic way (I will be happy if someone can provide me interresting
info btw).


> I apologise if what I'm saying is stupid as I'm not a developper, just a 
> ordinary Linux user who has been following the development of ACPI and swsusp 
> in order to have it's Laptop with the usual functionality of laptops..
> 
> In my first times with Linux in this machine (COMPAQ Presario 12XL515) I 
> used APM with kernel 2.2.17 (Debian Potato's version) and I had "S1" 
> behaviour with apm -S. At the time it was the single working function as the 
> battery status/information wasn't there, and "S4" seemed also to be absent ( 
> I know now that it was there but it needed a proper configured partition). 
> However with more recent kernels, both 2.2 and 2.4  (not patched with Debian 
> patches) I never had the APM sleeping function working again.

If you can not use anymore APM with 2.4 even with the working apm -S
for the debian's 2.2.17, then there is a generic problem here (regression).
I have not tryied this version of kernel.  Perhaps the only
difference is that it worked for you because most of the drivers
with the 2.2.17 was shipped as modules?

Cheers,

-- 
Ducrot Bruno

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


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