Power usage in S3

Power usage in S3

[Tim Dijkstra]

Hi,

Since a couple of weeks I have S3 working on my laptop (yeah!), but then
I stared wondering how long I can walk around with my laptop suspended.

By keeping it suspended for a night and extrapolating the measured power
usage I concluded it can stay suspended (starting with batteries fully
loaded) for about 2.5 days. That doesn't seem awfully long to me...
Especially if you take into account the fact one usually suspends
after using it for while when it's at, say, 20%.

So now I wonder, what usage do other people see?

grts Tim


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Re: Power usage in S3

[Vernon Mauery]

Tim Dijkstra wrote:
> Hi,
> 
> Since a couple of weeks I have S3 working on my laptop (yeah!), but then
> I stared wondering how long I can walk around with my laptop suspended.
> 
> By keeping it suspended for a night and extrapolating the measured power
> usage I concluded it can stay suspended (starting with batteries fully
> loaded) for about 2.5 days. That doesn't seem awfully long to me...
> Especially if you take into account the fact one usually suspends
> after using it for while when it's at, say, 20%.
> 
> So now I wonder, what usage do other people see?

I finally got the power issues resolved on my Thinkpad T40 too.  It can only
sleep in S3 for about 2 days too.  But, with a new high-capacity battery, it
could probably go for 4 days.  My wife's Thinkpad R40p can go for about a week,
but it has a new battery and the FireGL T2 graphics card rather than the Radeon
7500.  And it didn't need the radeon power stuff -- it only needed
acpi_sleep=s3_bios.  But, I am sure we can do better than 2-2.5 days... *But*, I
am very pleased that we have come this far.  For almost a year, I was using
swsusp2 every night going home from work.  As nice as that is, it still is too
slow for an overnight sleep.

--Vernon



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Re: Power usage in S3

[Stefan Dösinger]

Am Montag, 28. Februar 2005 18:33 schrieb Vernon Mauery:
> Tim Dijkstra wrote:
> > Hi,
> >
> > Since a couple of weeks I have S3 working on my laptop (yeah!), but then
> > I stared wondering how long I can walk around with my laptop suspended.
> >
> > By keeping it suspended for a night and extrapolating the measured power
> > usage I concluded it can stay suspended (starting with batteries fully
> > loaded) for about 2.5 days. That doesn't seem awfully long to me...
> > Especially if you take into account the fact one usually suspends
> > after using it for while when it's at, say, 20%.
> >
> > So now I wonder, what usage do other people see?
>
> I finally got the power issues resolved on my Thinkpad T40 too.  It can
> only sleep in S3 for about 2 days too.  But, with a new high-capacity
> battery, it could probably go for 4 days.  My wife's Thinkpad R40p can go
> for about a week, but it has a new battery and the FireGL T2 graphics card
> rather than the Radeon 7500.  And it didn't need the radeon power stuff --
> it only needed acpi_sleep=s3_bios.  But, I am sure we can do better than
> 2-2.5 days... *But*, I am very pleased that we have come this far.  For
> almost a year, I was using swsusp2 every night going home from work.  As
> nice as that is, it still is too slow for an overnight sleep.
My Acer Travelmate 803 looses ~20% battery power in 12 hours in S3 with Linux. 
Under Windows it dropped from 50% to 5% withhin 5h. Sounds strange, but at 
least the Linux value can be reproduced. I can't test with Windows again 
because it had to go to satisfy my disk space needs :-)

I think we're not so bad off with 2 days suspend time. On my old notebook I 
experienced that an empty battery(Notebook powered itself down in full use) 
can keep the device running in Suspend for ~2 hours. That was a NiMH battery, 
I don't have any experiance with my new Lithium-Ion batteries. I only know 
that it's bad if they are discharged that low.

With a secoundary battery I get 8 to 9 hours battery uptime with agressive 
power management settings(extrapolation done by klaptopdaemon, I didn't test 
it).

Stefan


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Re: Power usage in S3

[Pavel Machek]

Hi!

> > I finally got the power issues resolved on my Thinkpad T40 too.  It can
> > only sleep in S3 for about 2 days too.  But, with a new high-capacity
> > battery, it could probably go for 4 days.  My wife's Thinkpad R40p can go
> > for about a week, but it has a new battery and the FireGL T2 graphics card
> > rather than the Radeon 7500.  And it didn't need the radeon power stuff --
> > it only needed acpi_sleep=s3_bios.  But, I am sure we can do better than
> > 2-2.5 days... *But*, I am very pleased that we have come this far.  For
> > almost a year, I was using swsusp2 every night going home from work.  As
> > nice as that is, it still is too slow for an overnight sleep.
> My Acer Travelmate 803 looses ~20% battery power in 12 hours in S3 with Linux. 
> Under Windows it dropped from 50% to 5% withhin 5h. Sounds strange, but at 
> least the Linux value can be reproduced. I can't test with Windows again 
> because it had to go to satisfy my disk space needs :-)

Acer TM 803 is not yet in the video.txt list. What hacks do you need?

								Pavel
-- 
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!


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Re: Power usage in S3

[Stefan Dösinger]

Am Dienstag, 1. März 2005 00:13 schrieben Sie:
> Hi!
>
> > > I finally got the power issues resolved on my Thinkpad T40 too.  It can
> > > only sleep in S3 for about 2 days too.  But, with a new high-capacity
> > > battery, it could probably go for 4 days.  My wife's Thinkpad R40p can
> > > go for about a week, but it has a new battery and the FireGL T2
> > > graphics card rather than the Radeon 7500.  And it didn't need the
> > > radeon power stuff -- it only needed acpi_sleep=s3_bios.  But, I am
> > > sure we can do better than 2-2.5 days... *But*, I am very pleased that
> > > we have come this far.  For almost a year, I was using swsusp2 every
> > > night going home from work.  As nice as that is, it still is too slow
> > > for an overnight sleep.
> >
> > My Acer Travelmate 803 looses ~20% battery power in 12 hours in S3 with
> > Linux. Under Windows it dropped from 50% to 5% withhin 5h. Sounds
> > strange, but at least the Linux value can be reproduced. I can't test
> > with Windows again because it had to go to satisfy my disk space needs
> > :-)
>
> Acer TM 803 is not yet in the video.txt list. What hacks do you need?
>
I thought it's in the list because it's mentioned in the video.txt file in the 
kernel sources or better was mentioned namely before:

(5) radeon systems, where X can soft-boot your video card. You'll need
  patched X, and plain text console (no vesafb or radeonfb), see
  http://www.doesi.gmxhome.de/linux/tm800s3/s3.html.

It needs eighter the X patch(as mentioned), but  vbetool post, the lrmi-based 
boot-radeon and the x86emu video_post tool do also work. Ole Rohne's radeonfb 
patch does not work for some reason.

For proper device resume it needs the patch which splits up the resume 
functions so devices are re-enabled after leaving the acpi sleep state. I've 
sent it to len some tome ago, but I don't know if it's in the acpi mainline.

S3 works very well with this patch and vbetool, I only have to re-load the 
acerhk modules for the acer specific hotkeys. Currently I unload uhci-hcd and 
set the cpufreq governor to 'performance' before suspend. I don't know if 
that's still necessary. I'm using the vanilla 2.6.11-rc5 kernel + the 
mentioned acpi patch.

The howto page mentioned above needs updating, but I don't have the time 
because I'm really busy at school and will be for some time.


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Re: Power usage in S3

[Pavel Machek]

Hi!

> > > > I finally got the power issues resolved on my Thinkpad T40 too.  It can
> > > > only sleep in S3 for about 2 days too.  But, with a new high-capacity
> > > > battery, it could probably go for 4 days.  My wife's Thinkpad R40p can
> > > > go for about a week, but it has a new battery and the FireGL T2
> > > > graphics card rather than the Radeon 7500.  And it didn't need the
> > > > radeon power stuff -- it only needed acpi_sleep=s3_bios.  But, I am
> > > > sure we can do better than 2-2.5 days... *But*, I am very pleased that
> > > > we have come this far.  For almost a year, I was using swsusp2 every
> > > > night going home from work.  As nice as that is, it still is too slow
> > > > for an overnight sleep.
> > >
> > > My Acer Travelmate 803 looses ~20% battery power in 12 hours in S3 with
> > > Linux. Under Windows it dropped from 50% to 5% withhin 5h. Sounds
> > > strange, but at least the Linux value can be reproduced. I can't test
> > > with Windows again because it had to go to satisfy my disk space needs
> > > :-)
> >
> > Acer TM 803 is not yet in the video.txt list. What hacks do you need?
> >
> I thought it's in the list because it's mentioned in the video.txt file in the 
> kernel sources or better was mentioned namely before:
> 
> (5) radeon systems, where X can soft-boot your video card. You'll need
>   patched X, and plain text console (no vesafb or radeonfb), see
>   http://www.doesi.gmxhome.de/linux/tm800s3/s3.html.

I thought that was tm800 and tm803 is different machine.. video.txt
updated. Thanks.

> For proper device resume it needs the patch which splits up the resume 
> functions so devices are re-enabled after leaving the acpi sleep state. I've 
> sent it to len some tome ago, but I don't know if it's in the acpi
> mainline.

Len is slow at taking patches :-(.

								Pavel
-- 
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!


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Re: Power usage in S3

[Johan Vromans]

Tim Dijkstra <newsuser-TpnWJeB+oO0hKRfeEwdQzg@public.gmane.org> writes:

> Since a couple of weeks I have S3 working on my laptop (yeah!), but then
> I stared wondering how long I can walk around with my laptop suspended.

My old laptop (Toshiba Portégé 7020CT) could go for substantially more
than a week on suspend. Even when the batteries were worn out a week
was no problem. When on, it lasted for about two hours when new, and
less than half an hour now.

-- Johan



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