Bastien Nocera [2013-10-23 14:10 +0200]: > I want to try and reduce wake-ups in UPower (some more), and wanted to > disable polling of batteries when we have events sent for battery > capacity changes. > > Unfortunately, I don't have hardware that does this properly (my laptop > only sends out events when the state transitions, not when the battery > level changes).
My phone seems to do that. On charging: | KERNEL[92.074140] change /devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery (power_supply) | ACTION=change | DEVPATH=/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery | POWER_SUPPLY_CAPACITY=38 | POWER_SUPPLY_CHARGE_EMPTY=147070 | POWER_SUPPLY_CHARGE_FULL=2101000 | POWER_SUPPLY_CHARGE_NOW=2102473 | POWER_SUPPLY_CHARGE_TYPE=Fast | POWER_SUPPLY_CURRENT_NOW=-410000 | POWER_SUPPLY_HEALTH=Good | POWER_SUPPLY_NAME=battery | POWER_SUPPLY_PRESENT=1 | POWER_SUPPLY_STATUS=Charging | POWER_SUPPLY_TECHNOLOGY=Li-ion | POWER_SUPPLY_TEMP=245 | POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4360000 | POWER_SUPPLY_VOLTAGE_MIN_DESIGN=3200000 | POWER_SUPPLY_VOLTAGE_NOW=3872145 | SEQNUM=4086 | SUBSYSTEM=power_supply | | UDEV [92.107882] change /devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery (power_supply) | ACTION=change | DEVPATH=/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery | POWER_SUPPLY_CAPACITY=38 | POWER_SUPPLY_CHARGE_EMPTY=147070 | POWER_SUPPLY_CHARGE_FULL=2101000 | POWER_SUPPLY_CHARGE_NOW=2102473 | POWER_SUPPLY_CHARGE_TYPE=Fast | POWER_SUPPLY_CURRENT_NOW=-410000 | POWER_SUPPLY_HEALTH=Good | POWER_SUPPLY_NAME=battery | POWER_SUPPLY_PRESENT=1 | POWER_SUPPLY_STATUS=Charging | POWER_SUPPLY_TECHNOLOGY=Li-ion | POWER_SUPPLY_TEMP=245 | POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4360000 | POWER_SUPPLY_VOLTAGE_MIN_DESIGN=3200000 | POWER_SUPPLY_VOLTAGE_NOW=3872145 | SEQNUM=4086 | SUBSYSTEM=power_supply | USEC_INITIALIZED=76247 On discharging: | KERNEL[204.102065] change /devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery (power_supply) | ACTION=change | DEVPATH=/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery | POWER_SUPPLY_CAPACITY=38 | POWER_SUPPLY_CHARGE_EMPTY=83920 | POWER_SUPPLY_CHARGE_FULL=2098000 | POWER_SUPPLY_CHARGE_NOW=2105634 | POWER_SUPPLY_CHARGE_TYPE=N/A | POWER_SUPPLY_CURRENT_NOW=226600 | POWER_SUPPLY_HEALTH=Good | POWER_SUPPLY_NAME=battery | POWER_SUPPLY_PRESENT=1 | POWER_SUPPLY_STATUS=Discharging | POWER_SUPPLY_TECHNOLOGY=Li-ion | POWER_SUPPLY_TEMP=228 | POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4360000 | POWER_SUPPLY_VOLTAGE_MIN_DESIGN=3200000 | POWER_SUPPLY_VOLTAGE_NOW=3750297 | SEQNUM=4129 | SUBSYSTEM=power_supply | | UDEV [204.150806] change /devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery (power_supply) | ACTION=change | DEVPATH=/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/battery | POWER_SUPPLY_CAPACITY=38 | POWER_SUPPLY_CHARGE_EMPTY=83920 | POWER_SUPPLY_CHARGE_FULL=2098000 | POWER_SUPPLY_CHARGE_NOW=2105634 | POWER_SUPPLY_CHARGE_TYPE=N/A | POWER_SUPPLY_CURRENT_NOW=226600 | POWER_SUPPLY_HEALTH=Good | POWER_SUPPLY_NAME=battery | POWER_SUPPLY_PRESENT=1 | POWER_SUPPLY_STATUS=Discharging | POWER_SUPPLY_TECHNOLOGY=Li-ion | POWER_SUPPLY_TEMP=228 | POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4360000 | POWER_SUPPLY_VOLTAGE_MIN_DESIGN=3200000 | POWER_SUPPLY_VOLTAGE_NOW=3750297 | SEQNUM=4129 | SUBSYSTEM=power_supply | USEC_INITIALIZED=4104080 I get about one uevent in 10 seconds during discharging, and about one per second during charging. So using uevents for the latter won't help much for reducing wakeups, but I take it it doesn't matter that much while an AC is attached. Martin -- Martin Pitt | http://www.piware.de Ubuntu Developer (www.ubuntu.com) | Debian Developer (www.debian.org) _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
