| |||||||||||||
PowerTOP tops up to 2.1PowerTOP tops up to 2.1Posted Sep 3, 2012 23:33 UTC (Mon) by Baylink (subscriber, #755)In reply to: PowerTOP tops up to 2.1 by wookey Parent article: PowerTOP tops up to 2.1
Well, wookey, thank you for saving me a lot of time and trouble. I've got enough info out of powertop 1.13, and if 2.x doesn't show me watts anymore, I'm not sure I'm going to bother...
(Log in to post comments)
Showing watts Posted Sep 3, 2012 23:45 UTC (Mon) by corbet (editor, #1) [Link] It shows power consumption just fine on my machine. Like 1.x, you likely need to be off AC power before ACPI will tell powertop what the current usage is.
Showing watts Posted Sep 4, 2012 0:33 UTC (Tue) by wookey (subscriber, #5501) [Link]
Aha. That is indeed the secret. Unplug the power, get power consumption stats, plug it back in and they disappear. I suppose this is a feature of ACPI and/or what the hardware can measure. I'd have been much less confused if there was some kind of clue that this info would be displayed when off mains, such as a placeholder.
Showing watts Posted Sep 4, 2012 0:40 UTC (Tue) by Baylink (subscriber, #755) [Link]
Oh, that.
Silly me. Hadn't even thought about that. Thanks.
Showing watts Posted Sep 4, 2012 0:45 UTC (Tue) by mjg59 (subscriber, #23239) [Link]
ACPI doesn't report power consumption, it reports change in battery state. So if you're on AC, the interface that would tell you power consumption is instead telling you how fast your battery is charging…
Showing watts Posted Sep 4, 2012 23:15 UTC (Tue) by zlynx (subscriber, #2285) [Link]
And you should note that in most cases, the reported watt usage is correct because the battery hardware is working properly.
In some cases the watt usage will be incorrect because your battery is borked. I've seen this happen.
If your battery drops from 100% to 60% within 15 minutes, there is almost certainly something wrong with the battery. Or you are running an Alienware. :-)
Showing watts Posted Sep 5, 2012 23:25 UTC (Wed) by nix (subscriber, #2304) [Link]
... or it's an old battery with correspondingly high internal resistance due to oxidation. (This generally exhibits itself as a battery with 'high' capacity that drops fast, in my experience.)
|
|||||||||||||