X61s power consumption

[Tino Keitel-3]

Hi,

what power consumption can I expect from a X61s, 1,6 GHz (L7500) and 2
GB RAM in a minimal environment (no USB driver loaded, WLAN disabled,
lowest display brightness, hard disk spun down etc.)?

Regards,
Tino
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[Theodore Tso]

On Fri, May 23, 2008 at 05:34:01PM +0200, Tino Keitel wrote:
>
> what power consumption can I expect from a X61s, 1,6 GHz (L7500) and 2
> GB RAM in a minimal environment (no USB driver loaded, WLAN disabled,
> lowest display brightness, hard disk spun down etc.)?

8-9 Watts.  See:

http://thunk.org/tytso/blog/2007/10/29/tip-o-the-hat-wag-o-the-finger-linux-power-savings-for-laptop-users/

                                                        - Ted
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[Dmitry E. Mikhailov]

On Friday 23 May 2008 09:34:01 pm Tino Keitel wrote:
> Hi,
>
> what power consumption can I expect from a X61s, 1,6 GHz (L7500) and 2
> GB RAM in a minimal environment (no USB driver loaded, WLAN disabled,
> lowest display brightness, hard disk spun down etc.)?
>
> Regards,
> Tino

On my X41 (2526-67G, 2x512MB DDR2, 1.5GHz Centrino, 40Gb 1.8inch 4200RPM HDD)
with no X started (init 3), HDD in sleep mode (not rotating), minimal modules
(see later) I got 9.7 watts consumption and 5.6 wakeups per second according
to PowerTOP and 641 milliamps of battery current according to tp_smapi.

With normal use (WiFi on, all modules, backlight minimum, X started, Opera
browser, Gajim.py, hdapsd etc) I got 13.7W power consumption and 280 wakeups
according to PowerTOP.

IMHO on your X61 you can expect similar numbers.

P.S. kernel 2.6.23.16 patched with high-resolution-timer-5,
centrino-undervoltage, WiFi power management mode set for maximum battery
conservation, power governor is ondemand, ethernel WoL disabled.

Minimalistic module list. Could be cleaned further but I'm too lazy for that.

Module                  Size  Used by
tp_smapi               20496  0
thinkpad_ec             7056  1 tp_smapi
nfsd                  204272  17
exportfs                4736  1 nfsd
lockd                  59272  2 nfsd
nfs_acl                 3392  1 nfsd
auth_rpcgss            37984  1 nfsd
autofs4                19076  2
fuse                   42836  1
sunrpc                154460  8 nfsd,lockd,nfs_acl,auth_rpcgss
binfmt_misc            10504  1
dm_mirror              19072  0
dm_multipath           16776  0
dm_mod                 49408  2 dm_mirror,dm_multipath
uinput                  8576  0
rtc_cmos                7136  0
rtc_core               16664  1 rtc_cmos
rtc_lib                 2944  1 rtc_core
video                  18512  0
output                  3648  1 video
sg                     28252  0
ata_piix               16644  3
libata                112496  1 ata_piix
sd_mod                 22736  4
scsi_mod               96072  3 sg,libata,sd_mod


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[Tino Keitel-3]

On Fri, May 23, 2008 at 12:14:36 -0400, Theodore Tso wrote:
> On Fri, May 23, 2008 at 05:34:01PM +0200, Tino Keitel wrote:
> >
> > what power consumption can I expect from a X61s, 1,6 GHz (L7500) and 2
> > GB RAM in a minimal environment (no USB driver loaded, WLAN disabled,
> > lowest display brightness, hard disk spun down etc.)?
>
> 8-9 Watts.  See:
>
> http://thunk.org/tytso/blog/2007/10/29/tip-o-the-hat-wag-o-the-finger-linux-power-savings-for-laptop-users/

Thanks, sounds promising, together with the 8 cell battery. Or at least
not worse than my T23, which can go below 10 Watts.

Regards,
Tino
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[Tino Keitel-3]

On Fri, May 23, 2008 at 12:14:36 -0400, Theodore Tso wrote:
> On Fri, May 23, 2008 at 05:34:01PM +0200, Tino Keitel wrote:
> >
> > what power consumption can I expect from a X61s, 1,6 GHz (L7500) and 2
> > GB RAM in a minimal environment (no USB driver loaded, WLAN disabled,
> > lowest display brightness, hard disk spun down etc.)?
>
> 8-9 Watts.  See:

For the records:

I measured slightly below 9 Watts (the lowest was 8,7 Watts) with and
idle Xfce desktop, active wireless (but only light traffic) and these
power saving features turned on:

1. wireless power saving:

echo 5 > /sys/bus/pci/drivers/iwl4965/*/power_level

2. dark display (not very usable, though)

xbacklight -set 0

3. ethernet power saving

ip link set eth0 down
ethtool -s eth0 wol d
ethtool -s eth0 speed 100

4. disabled CardBus

cd /sys/bus/pci/drivers/yenta_cardbus
for i in 0* ; do
        echo -n "$i" > unbind
done

rmmod yenta_socket

5. no USB

rmmod uhci_hcd
rmmod ehci_hcd

6. low display refresh rate

xrandr --rate 40

7. hard disk power saving (spin down when idle)

- mounted all ext3 partitions with commit=20000,reltime mount options
- used a patched noflushd that works with libata

8. no sucky applications

- kill apps like gkrellm, firefox etc. that constantly eat CPU power

9. SATA link power management

echo min_power > /sys/class/scsi_host/host0/link_power_management_policy

10. Intel Speedstep for both cores

cpufreq-set -g ondemand
cpufreq-set -g ondemand -c1

Is there anything that I missed (except for ugly hacks like
undervolting)?

Regards,
Tino
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[Igor V. Rafienko-2]

on Jun 25, 2008, 20:41, Tino Keitel wrote:

[ ... ]

> 10. Intel Speedstep for both cores
>
> cpufreq-set -g ondemand
> cpufreq-set -g ondemand -c1
>
> Is there anything that I missed (except for ugly hacks like
> undervolting)?


Would the powersave governor be more useful? If the workload is light (say
typing some stuff in emacs/vim/e-mails), that should still leave you
plenty of juice.





ivr
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[Henrique de Moraes Holschuh-2]

On Wed, 25 Jun 2008, Igor V. Rafienko wrote:
>> cpufreq-set -g ondemand
>
> Would the powersave governor be more useful? If the workload is light

According to Intel itself, no.

--
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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[Rolf Kutz-2]

On 25/06/08 17:25 -0300, Henrique de Moraes Holschuh wrote:
>On Wed, 25 Jun 2008, Igor V. Rafienko wrote:
>>> cpufreq-set -g ondemand
>>
>> Would the powersave governor be more useful? If the workload is light
>
>According to Intel itself, no.

It shouldn't be called powersave governor, but low
performance governor (or maybe low temperature
governor).

regards, Rolf
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[Tino Keitel-3]

On Wed, Jun 25, 2008 at 20:41:48 +0200, Tino Keitel wrote:

[...]

> 2. dark display (not very usable, though)
>
> xbacklight -set 0

I noticed that xbacklight -set 0 behaves different with different
setups on the same hardware. With a kernel from Debian unstable
(2.6.25), the level 0 was quite dark, but readable in a dark
environment. With a custom kernel (also 2.6.25), setting it to 0 gives
a completly dark screen, just the window borders are visible a little
bit.

As I don't want to measure the power consumption of an unusable
computer, I always use a brightness that is still usable. So the above
command should be adjusted to something that gives a somewhat usable
bightness when comparing numbers.

Regards,
Tino
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[Yves-Alexis Perez-2]

On Thu, Jun 26, 2008 at 05:43:57PM +0200, Tino Keitel wrote:

> I noticed that xbacklight -set 0 behaves different with different
> setups on the same hardware. With a kernel from Debian unstable
> (2.6.25), the level 0 was quite dark, but readable in a dark
> environment. With a custom kernel (also 2.6.25), setting it to 0 gives
> a completly dark screen, just the window borders are visible a little
> bit.
>
> As I don't want to measure the power consumption of an unusable
> computer, I always use a brightness that is still usable. So the above
> command should be adjusted to something that gives a somewhat usable
> bightness when comparing numbers.

It may depend wether acpi video.ko is loaded, wether thinkpad-acpi is
loaded, what are the kernel config etc.

On my T61, at one time, depending on the kernel and X driver, and the
method used by xbackight (see in xrandr -prop), the 0 could be complete
dark, black, lcd switched off, or only a "minimal brightness". Currently
0 is "only" minimum brightness.
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[Tony Chang-3]

Let me start by apologizing for the slightly off-topic nature of my email, but people on this list seem to have their wits about them far better than other Thinkpad groups I've seen.

I have two Thinkpads, a T60 and T60p.  The T60 runs Windows XP SP2 and the T60p runs Ubuntu 8.04 on 2.6.24-19.  They are both running BIOS 79ETE2WW.
Both of these machines occasionally lockup with inconsistent frequency.  When this happens, the mouse stops working, all input on the keyboard stops working, and the video locks up.  I did notice that fn+ScrLk (to turn on/off NmLk) still works, though.

Since this problem happens in both Linux and Windows I don't believe it's the OS but I'm hoping someone here has run into a similar issue and can provide some guidance and/or URLs.

Thanks,

Tony

[Jose Celestino]

Words by Tony Chang [Thu, Jun 26, 2008 at 10:41:45AM -0700]:
>
> Let me start by apologizing for the slightly off-topic nature of my email, but people on this list seem to have their wits about them far better than other Thinkpad groups I've seen.
>

Being off-topic is not the worst. The thread highjacking is worse.

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[Henrique de Moraes Holschuh-2]

On Thu, 26 Jun 2008, Tony Chang wrote:
> Let me start by apologizing for the slightly off-topic nature of my email,
> but people on this list seem to have their wits about them far better than
> other Thinkpad groups I've seen.

It is not off-topic, but the thread hijacking wasn't nice.  That said, since
you at least changed the subject, it doesn't matter much.

> I have two Thinkpads, a T60 and T60p.  The T60 runs Windows XP SP2 and the
> T60p runs Ubuntu 8.04 on 2.6.24-19.  They are both running BIOS 79ETE2WW.
> Both of these machines occasionally lockup with inconsistent frequency.
> When this happens, the mouse stops working, all input on the keyboard
> stops working, and the video locks up.  I did notice that fn+ScrLk (to
> turn on/off NmLk) still works, though.
>
> Since this problem happens in both Linux and Windows I don't believe it's
> the OS but I'm hoping someone here has run into a similar issue and can
> provide some guidance and/or URLs.

Looks like a job for Lenovo, to me.  You should report the issue to them,
the fact that it hits both Linux and Windows, in two different T60 models,
is quite a hint that it is caused by hardware or firmware issues.

--
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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[Tony Chang-3]

I'm sorry for hijacking a thread, this was my first non-response posting, so I didn't have the list email handy.

Thanks for the responses and sorry again for the faux pas.

Tony

Sent via BlackBerry by AT&T

-----Original Message-----
From: Henrique de Moraes Holschuh <hmh@...>

Date: Thu, 26 Jun 2008 20:03:58
To:Tony Chang <tony@...>
Cc:linux-thinkpad@...
Subject: Re: [ltp] Occasional lockups


On Thu, 26 Jun 2008, Tony Chang wrote:
> Let me start by apologizing for the slightly off-topic nature of my email,
> but people on this list seem to have their wits about them far better than
> other Thinkpad groups I've seen.

It is not off-topic, but the thread hijacking wasn't nice.  That said, since
you at least changed the subject, it doesn't matter much.

> I have two Thinkpads, a T60 and T60p.  The T60 runs Windows XP SP2 and the
> T60p runs Ubuntu 8.04 on 2.6.24-19.  They are both running BIOS 79ETE2WW.
> Both of these machines occasionally lockup with inconsistent frequency.
> When this happens, the mouse stops working, all input on the keyboard
> stops working, and the video locks up.  I did notice that fn+ScrLk (to
> turn on/off NmLk) still works, though.
>
> Since this problem happens in both Linux and Windows I don't believe it's
> the OS but I'm hoping someone here has run into a similar issue and can
> provide some guidance and/or URLs.

Looks like a job for Lenovo, to me.  You should report the issue to them,
the fact that it hits both Linux and Windows, in two different T60 models,
is quite a hint that it is caused by hardware or firmware issues.

--
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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