10.4.9 increases sleep power usage from 2 to 3 watts

I installed 10.4.9 on an Intel Mac mini 1.66 GHz. After the update was installed power usage displayed by the Kill-a-Watt shows that the Mac mini now uses 3 watts in sleep mode. Before the update it used 2 watts.
Does anyone know what changed in 10.4.9 that would require more power usage in sleep mode?
Thank you!

Based on your response, I removed all USB devices except the keyboard and tried sleep again. It was back to 2 watts. I then attached a single USB card reader and tried sleep mode again. It is still at 2 watts now. Apparently, removing the USB devices and plugging them back in after a few minutes changed the sleep mode power usage back to the old 2 watts.
Something in the 10.4.9 update seems to have impacted power usage if USB devices are connected during the update. It is nice that the power usage goes back to normal after unplugging all the USB devices.

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I've updated my laptop today after a long time (3.0.x -> 3.1.5). There is a noticeable improvement in power usage.
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Edit: acpi -b matches longterm
Edit2: laptop is Samsung NF210
Last edited by fsckd (2011-12-23 18:19:30)

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Update: http://docs.info.apple.com/article.html?artnum=304378
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PowerTop - no ACPI power usage estimate available

Hi,
I installed powertop package to find out what my power usage is. But when I start powertop and wait (hours..), it gives me no information about my power usage, of course I'm on battery:
PowerTOP version 1.13 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 0.0%) 2.27 Ghz 1.6%
polling 31.8ms ( 0.3%) 2.14 Ghz 0.0%
C1 mwait 0.1ms ( 0.0%) 1466 Mhz 0.1%
C2 mwait 1.1ms ( 1.4%) 1333 Mhz 0.3%
C3 mwait 6.0ms (108.6%) 933 Mhz 98.0%
Wakeups-from-idle per second : 193.9 interval: 5.0s
no ACPI power usage estimate available
Top causes for wakeups:
34.7% ( 62.4) [i915] <interrupt>
12.8% ( 23.0) kworker/0:1
11.9% ( 21.4) kworker/0:0
10.9% ( 19.6) [ath9k] <interrupt>
6.2% ( 11.2) [kernel core] hrtimer_start (tick_sched_timer)
5.6% ( 10.0) kworker/u:1
btw. What about my wakeups, is it OK ?
My laptop is Asus A52f.
Thanks in advance.

I've been affected too and the proc -> sysfs 'reaffirmation' of sorts was my first thought.
Still my issue lies somewhere in between. Powertop simply displays wrong output, now saying my old laptop lasts around 47 hours @ 1 Watt when fully charged -- either that, or my laptop did found the key to ultimate power consumption efficiency while I was sleeping. Damn Transformer.

Linux vs. linux-ck power usage - laptop users please post your results

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krum wrote:With the last ck i7-avx, I jump from 10W (stock arch) to 15W on my laptop with the same kernel options and same usage.
I will investigate further another time...
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Hi,
I did my test with powertop.
I got also higher temp:
[root@akira david]# uname -a && uptime && fan
Linux akira 3.0-ck #1 SMP PREEMPT Sun Aug 21 05:31:12 EDT 2011 x86_64 Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz GenuineIntel GNU/Linux
22:20:24 up 10:26, 4 users, load average: 0.00, 0.03, 0.07
speed: 2616
level: auto
Core 0: +47.0°C
Core 1: +42.0°C
[root@akira david]# uname -a && uptime && fan
Linux akira 3.0-ARCH #1 SMP PREEMPT Wed Aug 17 21:55:57 CEST 2011 x86_64 Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz GenuineIntel GNU/Linux
22:22:52 up 2 min, 4 users, load average: 0.28, 0.19, 0.08
speed: 2630
level: auto
Core 0: +39.0°C
Core 1: +38.0°C
EDIT:
[root@akira david]# uname -a && uptime && fan
Linux akira 3.0-ck #1 SMP PREEMPT Sun Aug 21 05:31:12 EDT 2011 x86_64 Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz GenuineIntel GNU/Linux
22:29:41 up 2 min, 4 users, load average: 0.18, 0.24, 0.10
speed: 2644
level: auto
Core 0: +40.0°C
Core 1: +35.0°C
My bad, I forget to had these kernel boot option: pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
So it seems to be OK, I will do new powertop test when my battery will be full.
Last edited by krum (2011-08-28 21:11:47)

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Message was edited by: Nemo08

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(Note that I am affiliated with this site, and some pages contain ads).

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I got my iPod touch 4th Generation last Christmas from Japan.
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Message was edited by: nikonix110

i just called apple about 5 mins ago and they said that they have never heard of this problem..they dont want to accept the fact that thier product is a lemon...they told me to buy a new one or get this one repaired..hope someone from apple reads this and tries to help their customers..
.....hope they employ some grown ups to assemble these products in china..not little kids..
what a waste of money..

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10.4.9 increases sleep power usage from 2 to 3 watts

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