I got a new laptop a while ago, and have been having the issue that the battery drains while the laptop is off.
By "off", I mean a full shutdown (e.g. shutdown -h now).
Over an eight hour off-period, the battery discharges around 15-20%.
This seems to be a Linux / ACPI-specific issue, because it does not happen if I shutdown the laptop from Windows.
It also does not happen if I boot Linux with the "acpi=off" kernel parameter, and then perform a shutdown.
I have tried various things to solve this, but have been unsuccessful:
1. Replace the battery.
2. Upgrade from kernel 3.2.12 gentoo sources to 3.4.9 vanilla sources.
3. Disable all power / wakeup related features in the laptop's BIOS.
4. Disable wake-on-lan using the command "ethtool -s eth0 wol d". Even though wake-on-lan has been disabled in the BIOS, "ethtool" shows it as on after every reboot.
5. Disable all wake-up actions in /proc/acpi/wakeup.
6. Disable bluetooth using "echo 1 > /sys/devices/LNXSYSTM:00/device:00/TOS6208:00/rfkill/rfkill1/state".
7. Disable the wlan adapter using the FN+F8 hotkey.
Here's my kernel .config: http://pastebin.com/NRzK85bp
Here's my dmesg output: http://pastebin.com/BW4fE4tG
I can't think of anything else to try, but I also want to avoid using the "acpi=off" parameter, because then various programs don't work.
I would appreciate any help / hints.