http://bugzilla.kernel.org/show_bug.cgi?id=12632
Summary: don't assume we are fully charged when not charging or
discharging
Product: ACPI
Version: 2.5
KernelVersion: 2.6.29-rc3
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Battery
AssignedTo: acpi_power-batt...@kernel-bugs.osdl.org
ReportedBy: rich...@hughsie.com
Latest working kernel version: None
Earliest failing kernel version: Everything since ACPI moved to using the
power_supply class
Distribution: Fedora rawhide
Hardware Environment: Lenovo T61
Software Environment: Fedora rawhide
Problem Description:
On hardware like the T61 it can take a couple of seconds for the battery
to start charging after the power is connected, and we incorrectly tell
userspace that we are fully charged, and then go back to charging.
Only mark a battery as fully charged when the preset charge matches either
the last full charge, or the design charge.
Steps to reproduce:
Charge battery to 50%. Watch /sys/class/power_supply/BAT*/status, and observe
that when the power is disconnected, the status goes from
charging->fully_charged->discharging. This also happens when going from battery
to AC. This greatly confuses userspace.
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