On 2/27/2012 6:09 AM, Jaroslav Skarvada wrote: > > ----- Original Message ----- >> Dear Jaroslav, >> >> >> Am Freitag, den 24.02.2012, 16:00 +0100 schrieb Jaroslav Škarvada: >>> Proposed fix for firmwares that provides POWER_NOW instead of >>> CURRENT_NOW. >> >> thank you for the patch. Could you elaborate on the problem you are >> addressing and add maybe a link to more information about the >> difference >> between POWER_NOW and CURRENT_NOW? >> > Hi, > > according to ACPI spec the "Power Unit" of _BIF (Battery Information) > object can be: > > 0x00000000 – Capacity information is reported in [mWh] and charge/ > discharge rate information in [mW]. > 0x00000001 – Capacity information is reported in [mAh] and charge/ > discharge rate information in [mA]. > > The kernel ACPI battery driver uses this information and exposes > charge_battery_props (i.e. the CURRENT_NOW) or energy_battery_props > (i.e. the POWER_NOW) according to value of "Power Unit". > > This problem was originally reported as: > http://bugzilla.redhat.com/show_bug.cgi?id=796068 > yeah it makes total sense for powertop to understand both units.. they can be converted into eachother anyway
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