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.

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