[Bug 364979] New: kpowersave miscalculates consumption
https://bugzilla.novell.com/show_bug.cgi?id=364979 Summary: kpowersave miscalculates consumption Product: openSUSE 10.3 Version: Final Platform: x86 OS/Version: openSUSE 10.3 Status: NEW Severity: Minor Priority: P5 - None Component: Mobile Devices AssignedTo: zoz@novell.com ReportedBy: jw@novell.com QAContact: qa@suse.de CC: behlert@novell.com Blocks: 357354 Found By: --- kpowersave shows in the middle pane the battery state, the precense of AC power and the current consumption. The consumption is spelled out in 5 digits precision, so one could assume the measurement is fairly accurate. Running on battery, the idle consumption is between 15105 mW and 17268 mW depending on display Brightness. This appears to be plausible. Connecting the AC while a 14.4V 5.2aH Battery is connected and ca 80% charged makes the power consumption rise to ca 40 Watts. This appears to be plausible. Connecting the AC while the regular (14.4V 2.5Ah) battery is connected a ca. 95% full, makes the power consumption drop immediatly to 10784 mW. It gradually sinks down to 2732 mW when only a few minutes remain until the battery is fully charged. The Power consumption is no longer displayed, when the battery is full. The readings from the last test are obviously false, as the laptop definitly generates more heat than 2.732 Watts could ever cause. I assume, with this type of battery connected, only the charging consumption of the battery is printed, not the consumtion of the machine. With the other type of battery the sum of both is printed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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User behlert@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c1
Stefan Behlert
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User zoz@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c2
Christian Zoz
With the other type of battery the sum of both is printed.
Which leads to the assumption that it depends on the hardware what you get. Afaik, kps just takes the numbers it get's from ACPI. And ACPI has just a function to ask the battery. So it's up to the battery what you read. And this data comes from /proc/acpi/__battery__: Therefore this is just battery data and not the consumption of the system. All we could change in this kind is the way this data is presented to the user to avoid misunderstanding. Jürgen, if you like you may check that information with the preinstalled Windoze. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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User jw@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c3
--- Comment #3 from Juergen Weigert
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User dkukawka@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c4
Danny Kukawka
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User hmuelle@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c9
Harald Mueller-Ney
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User dkukawka@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=364979#c10
Danny Kukawka
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