I've experienced this exact same problem on Ubuntu 9.04 and 9.10 running
on the first version of Macbook (1,1). I finally did some testing to get
real test results. The battery is roughly 50% of the original capacity
to start with:
design capacity: 50200 mWh
last full capacity: 27090 mWh
This problem is caused by the "platform" (ACPI) poweroff mode used (by
default) during hibernation. Switching to "shutdown" mode solves the
problem:
- in "platform" mode the battery is drained by ~13% in ~12 hours
- in "shutdown" mode the battery is not drained at all in ~12 hours
To fix this issue, I added a new script to /etc/pm/sleep.d and made it
executable:
#!/bin/sh
# /etc/pm/sleep.d/51local
case "$1" in
hibernate|suspend)
# Switch to "poweroff" mode (instead of "platform")
#
# Adapted from
#
# https://wiki.ubuntu.com/DebuggingKernelSuspendHibernateResume
echo shutdown > /sys/power/disk
;;
thaw|resume)
# Do nothing
;;
*) exit $NA
;;
esac
--
Toshiba laptop battery is drained while shut down
https://bugs.launchpad.net/bugs/110784
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