Comment 7 for bug 876279

After doing some research the problem makes me remind of a previous issue, when the udev had some conflict w optiarc drives, and produced far too many events: https://bugs.launchpad.net/linux/+bug/379780

Actually when the battery is in the netbook, the monitors of upower and udev report a tons of events.
Here’s the battery info of my netbook
$ cat /proc/acpi/battery/BAT0/*
alarm: unsupported
present: yes
design capacity: 2200 mAh
last full capacity: 2167 mAh
battery technology: rechargeable
design voltage: 11100 mV
design capacity warning: 220 mAh
design capacity low: 21 mAh
cycle count: 0
capacity granularity 1: 0 mAh
capacity granularity 2: -1 mAh
model number: Battery
serial number: 200000
battery type: LION
OEM info: Manufacture
present: yes
capacity state: ok
charging state: charged
present rate: 0 mA
remaining capacity: 2144 mAh
present voltage: 12499 mV

Here's the output of the upower monitor
$ upower --monitor
Monitoring activity from the power daemon. Press Ctrl+C to cancel.
[08:40:45.158] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:45.165] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:45.196] device removed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:46.224] device added: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:46.235] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:46.245] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:46.256] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:46.257] device changed: /org/freedesktop/UPower/devices/line_power_AC0
[08:40:47.120] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:47.286] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:47.344] device removed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:48.337] device added: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:48.351] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:48.362] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:48.372] device changed: /org/freedesktop/UPower/devices/battery_BAT0
[08:40:48.372] device changed: /org/freedesktop/UPower/devices/line_power_AC0
...

The output of the udev monitor
$ udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[350.765144] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [350.768243] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[350.829713] remove /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[350.829896] add /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[350.830243] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [350.833709] remove /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [350.844231] add /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [350.853118] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[350.871278] change /devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC0 (power_supply)
UDEV [350.876821] change /devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC0 (power_supply)
KERNEL[352.885204] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [352.889076] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[352.967214] remove /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[352.967453] add /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[352.967716] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [352.970506] remove /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [352.984979] add /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
UDEV [352.994303] change /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 (power_supply)
KERNEL[353.006645] change /devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC0 (power_supply)
UDEV [353.012196] change /devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC0 (power_supply)
…

As a comparison here’s the battery info of a Dell Inspiron that works well with udev/upower
$ cat /proc/acpi/battery/BAT0/*
alarm: unsupported
present: yes
design capacity: 4400 mAh
last full capacity: 4609 mAh
battery technology: rechargeable
design voltage: 11100 mV
design capacity warning: 440 mAh
design capacity low: 133 mAh
cycle count: 0
capacity granularity 1: 44 mAh
capacity granularity 2: 44 mAh
model number: DELL 8NH5512
serial number: 3491
battery type: LION
OEM info: SMP
present: yes
capacity state: ok
charging state: charged
present rate: 1 mA
remaining capacity: 4609 mAh
present voltage: 12449 mV

For the first sight the main difference between these batteries is the capacity granularity values; i'd say the values (0 and -1) could cause problems (division by zero, non managed interval...?)